{"id":8436,"date":"2026-07-01T14:20:45","date_gmt":"2026-07-01T06:20:45","guid":{"rendered":"https:\/\/www.jodoo.com\/blog\/?p=8436"},"modified":"2026-07-21T17:41:46","modified_gmt":"2026-07-21T09:41:46","slug":"thoi-gian-trung-binh-den-khi-hong-mttf","status":"publish","type":"post","link":"https:\/\/www.jodoo.com\/blog\/vi-vn\/mean-time-to-failure-mttf","title":{"rendered":"Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng h\u00f3c (MTTF): \u0110\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng trong l\u1eadp k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec"},"content":{"rendered":"

<\/span>Gi\u1edbi thi\u1ec7u: Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng h\u00f3c (MTTF) cho \u0111\u1ed9i ng\u0169 b\u1ea3o tr\u00ec bi\u1ebft \u0111i\u1ec1u g\u00ec?<\/span><\/h2>\n\n\n\n

Vi\u1ec7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ngo\u00e0i k\u1ebf ho\u1ea1ch c\u00f3 th\u1ec3 khi\u1ebfn c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ec7t h\u1ea1i t\u1eeb h\u00e0ng ngh\u00ecn \u0111\u1ebfn h\u00e0ng tr\u0103m ngh\u00ecn \u0111\u00f4 la m\u1ed7i gi\u1edd, t\u00f9y thu\u1ed9c v\u00e0o quy tr\u00ecnh, c\u01b0\u1eddng \u0111\u1ed9 lao \u0111\u1ed9ng v\u00e0 s\u1ef1 gi\u00e1n \u0111o\u1ea1n \u1edf c\u00e1c kh\u00e2u ti\u1ebfp theo. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, nguy\u00ean nh\u00e2n kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ed1 h\u1ecfng h\u00f3c m\u00e1y m\u00f3c l\u1edbn m\u00e0 l\u00e0 m\u1ed9t linh ki\u1ec7n nh\u1ecf \u0111\u00e3 h\u1ebft tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng m\u00e0 kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o r\u00f5 r\u00e0ng. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao... Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng (MTTF)<\/a><\/strong> Tr\u1edf n\u00ean h\u1eefu \u00edch cho c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady.<\/p>\n\n\n\n

N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, MTTF l\u00e0 tu\u1ed5i th\u1ecd ho\u1ea1t \u0111\u1ed9ng trung b\u00ecnh c\u1ee7a m\u1ed9t linh ki\u1ec7n kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa<\/strong> Tr\u01b0\u1edbc khi n\u00f3 b\u1ecb h\u1ecfng v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn nh\u01b0 c\u1ea3m bi\u1ebfn, c\u1ea7u ch\u00ec, b\u1ed9 l\u1ecdc, pin v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i v\u00f2ng bi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t \u00f4 t\u00f4, d\u00e2y chuy\u1ec1n \u0111i\u1ec7n t\u1eed v\u00e0 c\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u00f4ng nghi\u1ec7p n\u00f3i chung. Thay v\u00ec coi m\u1ed7i s\u1ef1 c\u1ed1 l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n ri\u00eang l\u1ebb, MTTF gi\u00fap b\u1ea1n \u0111\u1ecbnh l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c th\u1eddi gian s\u1eed d\u1ee5ng trung b\u00ecnh c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn n\u00e0y trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n

B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch t\u00ednh MTTF m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng MTTF thay v\u00ec MTBF, v\u00e0 MTTR ph\u00f9 h\u1ee3p nh\u01b0 th\u1ebf n\u00e0o trong b\u1ee9c tranh t\u1ed5ng th\u1ec3 v\u1ec1 \u0111\u1ed9 tin c\u1eady. B\u00e0i vi\u1ebft c\u0169ng cho th\u1ea5y MTTF h\u1ed7 tr\u1ee3 c\u00e1c quy\u1ebft \u0111\u1ecbnh b\u1ea3o tr\u00ec th\u1ef1c t\u1ebf nh\u01b0 th\u1ebf n\u00e0o, t\u1eeb th\u1eddi \u0111i\u1ec3m thay th\u1ebf v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch ph\u1ee5 t\u00f9ng \u0111\u1ebfn \u0111\u00e1nh gi\u00e1 nh\u00e0 cung c\u1ea5p v\u00e0 chu\u1ea9n b\u1ecb cho vi\u1ec7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n

<\/span>\u0110\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch t\u00ednh to\u00e1n ch\u00ednh x\u00e1c MTTF<\/span><\/h2>\n\n\n\n

<\/span>\u00dd ngh\u0129a c\u1ee7a MTTF trong ph\u00e2n t\u00edch \u0111\u1ed9 tin c\u1eady<\/span><\/h3>\n\n\n\n

Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng h\u00f3c, hay MTTF<\/a><\/strong>, l\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng trung b\u00ecnh kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa<\/strong> B\u1ed9 ph\u1eadn n\u00e0y \u0111\u01b0\u1ee3c k\u1ef3 v\u1ecdng s\u1ebd ho\u1ea1t \u0111\u1ed9ng tr\u01b0\u1edbc khi h\u1ecfng v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf. Trong th\u1ef1c ti\u1ec5n b\u1ea3o tr\u00ec, ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t cho c\u00e1c b\u1ed9 ph\u1eadn nh\u01b0 v\u00f2ng bi, c\u1ea7u ch\u00ec, b\u1ed9 l\u1ecdc, c\u1ea3m bi\u1ebfn v\u00e0 pin khi b\u1ed9 ph\u1eadn b\u1ecb h\u1ecfng kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c v\u1ec1 tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u th\u00f4ng qua s\u1eeda ch\u1eefa. S\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 r\u1ea5t quan tr\u1ecdng v\u00ec MTTF (Th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng trung b\u00ecnh tr\u01b0\u1edbc khi h\u1ecfng) l\u00e0 kho\u1ea3ng... tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng \u0111\u1ebfn khi thay th\u1ebf<\/strong>, Kh\u00f4ng ph\u1ea3i th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng gi\u1eefa c\u00e1c l\u1ea7n s\u1eeda ch\u1eefa.<\/p>\n\n\n\n

V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn tr\u00ean d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u0111i\u1ec7n t\u1eed b\u1ecb h\u1ecfng, nh\u00f3m b\u1ea3o tr\u00ec th\u01b0\u1eddng s\u1ebd thay th\u1ebf n\u00f3 thay v\u00ec s\u1eeda ch\u1eefa l\u1ea1i ch\u00ednh c\u1ea3m bi\u1ebfn. Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, vi\u1ec7c theo d\u00f5i Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng (MTTF) cung c\u1ea5p cho b\u1ea1n m\u1ed9t c\u01a1 s\u1edf th\u1ef1c t\u1ebf \u0111\u1ec3 \u01b0\u1edbc t\u00ednh tu\u1ed5i th\u1ecd theo lo\u1ea1i linh ki\u1ec7n, d\u00e2y chuy\u1ec1n ho\u1eb7c l\u00f4 h\u00e0ng c\u1ee7a nh\u00e0 cung c\u1ea5p. \u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MTTF v\u00e0 MTBF tr\u1edf n\u00ean quan tr\u1ecdng sau n\u00e0y: ch\u00fang tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi v\u1ec1 \u0111\u1ed9 tin c\u1eady kh\u00e1c nhau.<\/p>\n\n\n\n

<\/span>C\u00f4ng th\u1ee9c MTTF<\/span><\/h3>\n\n\n\n

C\u00f4ng th\u1ee9c MTTF ti\u00eau chu\u1ea9n r\u1ea5t \u0111\u01a1n gi\u1ea3n:<\/p>\n\n\n\n

MTTF = T\u1ed5ng s\u1ed1 gi\u1edd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u00f7 T\u1ed5ng s\u1ed1 l\u1ea7n h\u1ecfng h\u00f3c<\/strong><\/p>\n\n\n\n

Trong c\u00f4ng th\u1ee9c n\u00e0y, t\u1ed5ng s\u1ed1 gi\u1edd ho\u1ea1t \u0111\u1ed9ng<\/strong> c\u00f3 ngh\u0129a l\u00e0 t\u1ed5ng th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng t\u00edch l\u0169y \u0111\u01b0\u1ee3c b\u1edfi to\u00e0n b\u1ed9 nh\u00f3m c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa gi\u1ed1ng h\u1ec7t nhau m\u00e0 b\u1ea1n \u0111ang ph\u00e2n t\u00edch, trong khi t\u1ed5ng s\u1ed1 l\u1ea7n th\u1ea5t b\u1ea1i<\/strong> Con s\u1ed1 n\u00e0y th\u1ec3 hi\u1ec7n s\u1ed1 l\u01b0\u1ee3ng c\u00e1c b\u1ed9 ph\u1eadn b\u1ecb h\u1ecfng trong su\u1ed1t th\u1eddi gian quan s\u00e1t. K\u1ebft qu\u1ea3 l\u00e0 tu\u1ed5i th\u1ecd trung b\u00ecnh t\u00ednh b\u1eb1ng gi\u1edd, chu k\u1ef3, ng\u00e0y ho\u1eb7c m\u1ed9t \u0111\u01a1n v\u1ecb kh\u00e1c. \u0111\u01a1n v\u1ecb th\u1eddi gian nh\u1ea5t qu\u00e1n<\/strong>. N\u1ebfu d\u1eef li\u1ec7u th\u1eddi gian ch\u1ea1y \u0111\u01b0\u1ee3c ghi l\u1ea1i b\u1eb1ng gi\u1edd, th\u00ec MTTF c\u1ee7a b\u1ea1n c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng gi\u1edd.<\/p>\n\n\n\n

\"H\u00ecnh<\/figure>\n\n\n\n

Y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 t\u00ednh to\u00e1n MTTF ch\u00ednh x\u00e1c l\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n. B\u1ea1n c\u1ea7n c\u00f9ng m\u1ed9t lo\u1ea1i linh ki\u1ec7n, \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 v\u00e0 s\u1ed1 li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u1ea3 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng v\u00e0 s\u1ed1 l\u1ea7n h\u1ecfng h\u00f3c trong to\u00e0n b\u1ed9 nh\u00f3m \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u. N\u1ebfu c\u00e1c y\u1ebfu t\u1ed1 \u0111\u1ea7u v\u00e0o kh\u00f4ng nh\u1ea5t qu\u00e1n, gi\u00e1 tr\u1ecb trung b\u00ecnh c\u00f3 th\u1ec3 tr\u00f4ng ch\u00ednh x\u00e1c nh\u01b0ng th\u1ef1c t\u1ebf l\u1ea1i che gi\u1ea5u s\u1ef1 bi\u1ebfn \u0111\u1ed9ng l\u1edbn v\u1ec1 \u0111\u1ed9 tin c\u1eady.<\/p>\n\n\n\n

<\/span>V\u00ed d\u1ee5 t\u1eebng b\u01b0\u1edbc t\u1eeb d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u0111i\u1ec7n t\u1eed<\/span><\/h3>\n\n\n\n

H\u00e3y xem x\u00e9t m\u1ed9t d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p linh ki\u1ec7n \u0111i\u1ec7n t\u1eed SMT s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n tr\u00ean nhi\u1ec1u tr\u1ea1m b\u0103ng t\u1ea3i. Trong h\u01a1n s\u00e1u th\u00e1ng, \u0111\u1ed9i b\u1ea3o tr\u00ec theo d\u00f5i 20 c\u1ea3m bi\u1ebfn gi\u1ed1ng h\u1ec7t nhau \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1. T\u1ed5ng c\u1ed9ng, c\u00e1c c\u1ea3m bi\u1ebfn n\u00e0y t\u00edch l\u0169y \u0111\u01b0\u1ee3c 48.000 gi\u1edd ho\u1ea1t \u0111\u1ed9ng, v\u00e0 trong th\u1eddi gian \u0111\u00f3, 8 c\u1ea3m bi\u1ebfn b\u1ecb h\u1ecfng v\u00e0 \u0111\u01b0\u1ee3c thay th\u1ebf.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c, ph\u00e9p t\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n

MTTF = 48.000 gi\u1edd \u00f7 8 l\u1ea7n h\u1ecfng h\u00f3c = 6.000 gi\u1edd<\/p>\n\n\n\n

\u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 tu\u1ed5i th\u1ecd trung b\u00ecnh d\u1ef1 ki\u1ebfn c\u1ee7a m\u1eabu c\u1ea3m bi\u1ebfn \u0111\u00f3, trong \u1ee9ng d\u1ee5ng \u0111\u00f3, l\u00e0 6.000 gi\u1edd ho\u1ea1t \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 m\u1ecdi c\u1ea3m bi\u1ebfn s\u1ebd h\u1ecfng ch\u00ednh x\u00e1c \u1edf 6.000 gi\u1edd. M\u1ed9t s\u1ed1 c\u00f3 th\u1ec3 h\u1ecfng \u1edf 4.500 gi\u1edd v\u00e0 m\u1ed9t s\u1ed1 kh\u00e1c \u1edf 7.200 gi\u1edd, nh\u01b0ng m\u1ee9c trung b\u00ecnh cung c\u1ea5p cho nh\u00f3m \u0111\u1ed9 tin c\u1eady m\u1ed9t ti\u00eau chu\u1ea9n h\u1eefu \u00edch \u0111\u1ec3 so s\u00e1nh c\u00e1c nh\u00e0 cung c\u1ea5p, thi\u1ebft l\u1eadp c\u00e1c \u0111i\u1ec3m xem x\u00e9t thay th\u1ebf v\u00e0 ph\u00e1t hi\u1ec7n c\u00e1c ki\u1ec3u h\u1ecfng h\u00f3c b\u1ea5t th\u01b0\u1eddng.<\/p>\n\n\n\n

B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng logic t\u01b0\u01a1ng t\u1ef1 cho c\u00e1c ph\u00e2n \u0111o\u1ea1n d\u1eef li\u1ec7u nh\u1ecf h\u01a1n. N\u1ebfu D\u00e2y chuy\u1ec1n A hi\u1ec3n th\u1ecb MTTF l\u00e0 7.100 gi\u1edd cho c\u00f9ng m\u1ed9t c\u1ea3m bi\u1ebfn trong khi D\u00e2y chuy\u1ec1n B hi\u1ec3n th\u1ecb 4.900 gi\u1edd, th\u00ec v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf linh ki\u1ec7n \u0111\u00f3. N\u00f3 c\u00f3 th\u1ec3 ch\u1ec9 ra s\u1ef1 nhi\u1ec5m b\u1ea9n, sai l\u1ec7ch, s\u1ef1 kh\u00f4ng \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p ho\u1eb7c t\u1ea3i ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau tr\u00ean m\u1ed9t d\u00e2y chuy\u1ec1n.<\/p>\n\n\n\n

<\/span>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p l\u00e0m sai l\u1ec7ch MTTF<\/span><\/h3>\n\n\n\n

M\u1ed9t l\u1ed7i th\u01b0\u1eddng g\u1eb7p l\u00e0 tr\u1ed9n l\u1eabn c\u00e1c nh\u00f3m t\u00e0i s\u1ea3n kh\u00e1c nhau<\/strong> trong c\u00f9ng m\u1ed9t ph\u00e9p t\u00ednh. N\u1ebfu b\u1ea1n k\u1ebft h\u1ee3p c\u00e1c c\u1ea3m bi\u1ebfn t\u1eeb b\u0103ng t\u1ea3i h\u00e0n ch\u1ea3y, b\u1ed9 c\u1ea5p li\u1ec7u g\u1eafp v\u00e0 \u0111\u1eb7t, v\u00e0 c\u00e1c tr\u1ea1m ki\u1ec3m tra cu\u1ed1i c\u00f9ng, m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng c\u00f3 th\u1ec3 qu\u00e1 kh\u00e1c bi\u1ec7t khi\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng c\u00f2n nhi\u1ec1u \u00fd ngh\u0129a. MTTF<\/a><\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y hi\u1ec7u qu\u1ea3 nh\u1ea5t khi c\u00e1c b\u1ed9 ph\u1eadn th\u1ef1c s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng v\u1ec1 ki\u1ec3u d\u00e1ng, ch\u1ee9c n\u0103ng v\u00e0 m\u1ee9c \u0111\u1ed9 d\u1ec5 h\u1ecfng.<\/p>\n\n\n\n

M\u1ed9t l\u1ed7i th\u01b0\u1eddng g\u1eb7p kh\u00e1c l\u00e0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u th\u1eddi gian ch\u1ea1y kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7<\/strong>. N\u1ebfu ch\u1ec9 th\u1ed1ng k\u00ea s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n h\u1ecfng nh\u01b0ng \u01b0\u1edbc t\u00ednh gi\u1edd ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch s\u01a1 s\u00e0i ho\u1eb7c ch\u1ec9 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb m\u1ed9t ca l\u00e0m vi\u1ec7c, th\u00ec th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng (MTTF) cu\u1ed1i c\u00f9ng s\u1ebd kh\u00f4ng \u0111\u00e1ng tin c\u1eady. Vi\u1ec7c thi\u1ebfu l\u1ecbch s\u1eed ho\u1ea1t \u0111\u1ed9ng c\u00f3 th\u1ec3 khi\u1ebfn tu\u1ed5i th\u1ecd c\u1ee7a linh ki\u1ec7n c\u00f3 v\u1ebb ng\u1eafn h\u01a1n ho\u1eb7c d\u00e0i h\u01a1n so v\u1edbi th\u1ef1c t\u1ebf, d\u1eabn \u0111\u1ebfn c\u00e1c quy\u1ebft \u0111\u1ecbnh b\u1ea3o tr\u00ec kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n

C\u00e1c \u0111\u1ed9i c\u0169ng g\u1eb7p r\u1eafc r\u1ed1i khi h\u1ecd \u0111\u1ebfm. thay th\u1ebf v\u00ec l\u00fd do ph\u00f2ng ng\u1eeba<\/strong> nh\u01b0 nh\u1eefng s\u1ef1 c\u1ed1. N\u1ebfu m\u1ed9t c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c thay th\u1ebf trong qu\u00e1 tr\u00ecnh t\u1eaft m\u00e1y theo k\u1ebf ho\u1ea1ch tr\u01b0\u1edbc khi n\u00f3 b\u1ecb h\u1ecfng, s\u1ef1 ki\u1ec7n \u0111\u00f3 kh\u00f4ng n\u00ean t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 m\u1ed9t s\u1ef1 c\u1ed1 trong t\u00ednh to\u00e1n MTTF. H\u00e3y t\u00e1ch bi\u1ec7t c\u00e1c s\u1ef1 ki\u1ec7n h\u1ecfng h\u00f3c kh\u1ecfi c\u00e1c l\u1ea7n thay th\u1ebf theo l\u1ecbch tr\u00ecnh, \u0111\u1ec3 ch\u1ec9 s\u1ed1 ph\u1ea3n \u00e1nh \u0111\u1ed9 tin c\u1eady th\u1ef1c t\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u00ednh s\u00e1ch.<\/p>\n\n\n\n

<\/span>M\u1ed9t ph\u00e9p t\u00ednh MTTF t\u1ed1t c\u1ea7n cho b\u1ea1n bi\u1ebft \u0111i\u1ec1u g\u00ec?<\/span><\/h3>\n\n\n\n

Ch\u1ec9 s\u1ed1 MTTF h\u1eefu \u00edch c\u1ea7n gi\u00fap b\u1ea1n tr\u1ea3 l\u1eddi m\u1ed9t c\u00e2u h\u1ecfi v\u1eadn h\u00e0nh c\u1ee5 th\u1ec3, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 \u0111i\u1ec1n v\u00e0o b\u00e1o c\u00e1o KPI. T\u1ed1i thi\u1ec3u, n\u00f3 c\u1ea7n cho b\u1ea1n bi\u1ebft m\u1ed9t linh ki\u1ec7n kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa c\u00f3 tu\u1ed5i th\u1ecd trung b\u00ecnh bao l\u00e2u trong m\u1ed9t b\u1ed1i c\u1ea3nh s\u1ea3n xu\u1ea5t nh\u1ea5t \u0111\u1ecbnh v\u00e0 li\u1ec7u tu\u1ed5i th\u1ecd \u0111\u00f3 c\u00f3 thay \u0111\u1ed5i theo th\u1eddi gian hay kh\u00f4ng. \u0110\u00f3 l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u th\u1ef1c t\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng MTTF nh\u1eb1m c\u1ea3i thi\u1ec7n k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec, m\u1eb7c d\u00f9 c\u00e1c quy\u1ebft \u0111\u1ecbnh l\u1eadp k\u1ebf ho\u1ea1ch th\u1ef1c t\u1ebf s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a ra \u1edf b\u01b0\u1edbc ti\u1ebfp theo.<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n th\u01b0\u1eddng xuy\u00ean t\u00ednh to\u00e1n MTTF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c), h\u00e3y \u0111\u1ea3m b\u1ea3o m\u1ed7i con s\u1ed1 \u0111\u1ec1u g\u1eafn li\u1ec1n v\u1edbi m\u1ed9t ph\u1ea1m vi r\u00f5 r\u00e0ng: b\u1ed9 ph\u1eadn n\u00e0o, d\u00e2y chuy\u1ec1n n\u00e0o, nh\u00e0 cung c\u1ea5p n\u00e0o, kho\u1ea3ng th\u1eddi gian n\u00e0o v\u00e0 c\u01a1 s\u1edf th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng n\u00e0o. S\u1ef1 k\u1ef7 lu\u1eadt \u0111\u00f3 gi\u00fap ch\u1ec9 s\u1ed1 n\u00e0y tr\u1edf n\u00ean h\u1eefu \u00edch h\u01a1n nhi\u1ec1u v\u00e0 c\u0169ng ng\u0103n ng\u1eeba s\u1ef1 nh\u1ea7m l\u1eabn sau n\u00e0y khi c\u00e1c nh\u00f3m so s\u00e1nh n\u00f3 v\u1edbi c\u00e1c ch\u1ec9 s\u1ed1 d\u1ef1a tr\u00ean s\u1eeda ch\u1eefa nh\u01b0 MTBF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c).<\/p>\n\n\n\n

<\/span>MTTF so v\u1edbi MTBF so v\u1edbi MTTR: L\u1ef1a ch\u1ecdn th\u01b0\u1edbc \u0111o \u0111\u1ed9 tin c\u1eady ph\u00f9 h\u1ee3p<\/span><\/h2>\n\n\n\n

<\/span>M\u1ed9t khu\u00f4n kh\u1ed5 nhanh \u0111\u1ec3 l\u1ef1a ch\u1ecdn ch\u1ec9 s\u1ed1 ph\u00f9 h\u1ee3p<\/span><\/h3>\n\n\n\n

Khi b\u1ea1n \u0111\u00e3 bi\u1ebft c\u00e1ch t\u00ednh MTTF, c\u00e2u h\u1ecfi ti\u1ebfp theo l\u00e0 n\u00f3 ph\u00f9 h\u1ee3p \u1edf \u0111\u00e2u so v\u1edbi c\u00e1c KPI b\u1ea3o tr\u00ec kh\u00e1c. C\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 ph\u00e2n bi\u1ec7t ch\u00fang l\u00e0 b\u1eb1ng c\u00e1ch \u0111\u1eb7t ra ba c\u00e2u h\u1ecfi th\u1ef1c t\u1ebf: S\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa hay thay th\u1ebf? S\u1ea3n ph\u1ea9m h\u1ecfng h\u00f3c th\u01b0\u1eddng xuy\u00ean nh\u01b0 th\u1ebf n\u00e0o? Th\u1eddi gian kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea5t bao l\u00e2u?<\/strong> Trong h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 m\u00e1y, b\u1ea1n c\u1ea7n c\u1ea3 ba g\u00f3c nh\u00ecn v\u00ec c\u00e1c b\u1ed9 ph\u1eadn ti\u00eau hao, t\u00e0i s\u1ea3n c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa v\u00e0 th\u1eddi gian ph\u1ea3n \u1ee9ng khi ng\u1eebng ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng di\u1ec5n ra theo c\u00f9ng m\u1ed9t c\u00e1ch.<\/p>\n\n\n\n

Khung so s\u00e1nh song song gi\u00fap: MTTF<\/a><\/strong> \u00c1p d\u1ee5ng cho c\u00e1c m\u1eb7t h\u00e0ng kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa., MTBF<\/strong> d\u00e0nh cho c\u00e1c t\u00e0i s\u1ea3n c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa v\u00e0 \u0111\u01b0a tr\u1edf l\u1ea1i ho\u1ea1t \u0111\u1ed9ng, v\u00e0 MTTR<\/strong> C\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 nh\u00f3m kh\u00f4i ph\u1ee5c ch\u1ee9c n\u0103ng sau s\u1ef1 c\u1ed1. C\u00f9ng nhau, ch\u00fang th\u1ec3 hi\u1ec7n kh\u00f4ng ch\u1ec9 \u0111\u1ed9 tin c\u1eady m\u00e0 c\u00f2n c\u1ea3 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 s\u1ef1 s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n

\"Bi\u1ec3u<\/figure>\n\n\n\n

<\/span>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MTTF v\u00e0 MTBF<\/span><\/h3>\n\n\n\n

MTTF<\/strong> \u01b0\u1edbc t\u00ednh tu\u1ed5i th\u1ecd trung b\u00ecnh c\u1ee7a m\u1ed9t b\u1ed9 ph\u1eadn b\u1ecb lo\u1ea1i b\u1ecf sau khi h\u1ecfng h\u00f3c, trong khi MTBF<\/strong> MTBF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c) \u01b0\u1edbc t\u00ednh th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c \u0111\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa v\u00e0 \u0111\u01b0a tr\u1edf l\u1ea1i ho\u1ea1t \u0111\u1ed9ng. N\u1ebfu m\u1ed9t b\u1ed9 ph\u1eadn kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u1ee5c h\u1ed3i, MTBF l\u00e0 ch\u1ec9 s\u1ed1 kh\u00f4ng ph\u00f9 h\u1ee3p ngay c\u1ea3 khi n\u00f3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t b\u00ean trong m\u1ed9t m\u00e1y m\u00f3c c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n

Trong m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u00f4 t\u00f4, c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn tr\u00ean m\u1ed9t b\u1ed9 ph\u1eadn g\u00e1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 thay th\u1ebf, v\u00ec v\u1eady MTTF (Th\u1eddi gian gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c) l\u00e0 th\u01b0\u1edbc \u0111o t\u1ed1t h\u01a1n cho nh\u00f3m c\u1ea3m bi\u1ebfn \u0111\u00f3. Tuy nhi\u00ean, b\u1ea3n th\u00e2n b\u1ed9 ph\u1eadn g\u00e1 l\u1ea1i l\u00e0 m\u1ed9t t\u00e0i s\u1ea3n c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa v\u00e0 v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng sau khi b\u1ea3o tr\u00ec, v\u00ec v\u1eady MTBF (Th\u1eddi gian gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c) l\u00e0 th\u01b0\u1edbc \u0111o \u0111\u1ed9 tin c\u1eady t\u1ed1t h\u01a1n cho b\u1ed9 ph\u1eadn g\u00e1. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec vi\u1ec7c tr\u1ed9n l\u1eabn hai ch\u1ec9 s\u1ed1 n\u00e0y c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebf ho\u1ea1ch thay th\u1ebf v\u00e0 b\u00e1o c\u00e1o \u0111\u1ed9 tin c\u1eady.<\/p>\n\n\n\n

<\/span>Ch\u1ec9 s\u1ed1 n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi k\u1ecbch b\u1ea3n s\u1ea3n xu\u1ea5t n\u00e0o?<\/span><\/h3>\n\n\n\n

S\u1eed d\u1ee5ng MTTF<\/strong> Khi b\u1ea1n theo d\u00f5i c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa nh\u01b0 c\u1ea7u ch\u00ec, b\u1ed9 l\u1ecdc, pin ho\u1eb7c c\u1ea3m bi\u1ebfn k\u00edn \u0111\u01b0\u1ee3c th\u00e1o ra v\u00e0 thay th\u1ebf sau khi h\u1ecfng. Trong thi\u1ebft b\u1ecb SMT, c\u1ea3m bi\u1ebfn c\u1ea5p ngu\u1ed3n ho\u1eb7c m\u00f4-\u0111un ngu\u1ed3n nh\u1ecf th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch theo c\u00e1ch n\u00e0y v\u00ec h\u00e0nh \u0111\u1ed9ng b\u1ea3o tr\u00ec l\u00e0 thay th\u1ebf ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u1ea1i tu. \u0110i\u1ec1u n\u00e0y l\u00e0m cho MTTF h\u1eefu \u00edch khi b\u1ea1n mu\u1ed1n so s\u00e1nh ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a nh\u00e0 cung c\u1ea5p ho\u1eb7c tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn gi\u1eefa c\u00e1c l\u00f4 h\u00e0ng.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng MTBF<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa \u0111\u01b0\u1ee3c nh\u01b0 b\u0103ng t\u1ea3i, m\u00e1y g\u1eafp \u0111\u1eb7t linh ki\u1ec7n, m\u00e1y b\u01a1m, m\u00e1y n\u00e9n kh\u00ed v\u00e0 l\u00f2 nung ch\u1ea3y. C\u00e1c t\u00e0i s\u1ea3n n\u00e0y \u0111\u01b0\u1ee3c k\u1ef3 v\u1ecdng s\u1ebd h\u1ecfng h\u00f3c, \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa v\u00e0 ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng trong th\u1eddi gian d\u00e0i. MTBF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c) l\u00e0 th\u01b0\u1edbc \u0111o t\u1ed1t h\u01a1n khi \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 tin c\u1eady c\u1ee7a t\u00e0i s\u1ea3n \u1edf c\u1ea5p \u0111\u1ed9 m\u00e1y m\u00f3c ho\u1eb7c h\u1ec7 th\u1ed1ng con h\u01a1n l\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a m\u1ed9t linh ki\u1ec7n d\u00f9ng m\u1ed9t l\u1ea7n.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng MTTR<\/strong> Khi c\u00e2u h\u1ecfi qu\u1ea3n l\u00fd ch\u00ednh l\u00e0 nh\u00f3m c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c s\u1ea3n xu\u1ea5t nhanh \u0111\u1ebfn m\u1ee9c n\u00e0o. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t h\u1ed7n h\u1ee3p, n\u01a1i ngay c\u1ea3 m\u1ed9t s\u1ef1 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ng\u1eafn c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c quy tr\u00ecnh tr\u01b0\u1edbc v\u00e0 sau \u0111\u00f3. N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng MTTF \u0111\u1ec3 c\u1ea3i thi\u1ec7n k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec, MTTR tr\u1edf th\u00e0nh ch\u1ec9 s\u1ed1 c\u00e2n b\u1eb1ng cho th\u1ea5y li\u1ec7u chi\u1ebfn l\u01b0\u1ee3c thay th\u1ebf c\u00f3 \u0111\u1ee7 hay kh\u00f4ng, ho\u1eb7c li\u1ec7u quy tr\u00ecnh s\u1eeda ch\u1eefa c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa \u00fd.<\/p>\n\n\n\n

<\/span>S\u1eed d\u1ee5ng MTTF \u0111\u1ec3 c\u1ea3i thi\u1ec7n k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec v\u00e0 quy\u1ebft \u0111\u1ecbnh v\u1ec1 ph\u1ee5 t\u00f9ng thay th\u1ebf<\/span><\/h2>\n\n\n\n

<\/span>Chuy\u1ec3n MTTF th\u00e0nh quy t\u1eafc thay th\u1ebf<\/span><\/h3>\n\n\n\n

Khi b\u1ea1n \u0111\u00e3 bi\u1ebft c\u00e1ch t\u00ednh to\u00e1n MTTF<\/a><\/strong>, B\u01b0\u1edbc ti\u1ebfp theo l\u00e0 quy\u1ebft \u0111\u1ecbnh h\u00e0nh \u0111\u1ed9ng n\u00e0o c\u1ea7n \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa, MTTF gi\u00fap b\u1ea1n thi\u1ebft l\u1eadp kho\u1ea3ng th\u1eddi gian thay th\u1ebf d\u1ef1a tr\u00ean tu\u1ed5i th\u1ecd th\u1ef1c t\u1ebf ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean d\u1ef1 \u0111o\u00e1n theo l\u1ecbch ho\u1eb7c th\u00f3i quen c\u1ee7a ng\u01b0\u1eddi v\u1eadn h\u00e0nh. <\/p>\n\n\n\n

Ch\u1ec9 s\u1ed1 MTTF cao th\u01b0\u1eddng cho th\u1ea5y hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh c\u1ee7a linh ki\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh hi\u1ec7n t\u1ea1i, nh\u01b0ng ch\u1ec9 s\u1ed1 MTTF gi\u1ea3m c\u1ea7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra thay v\u00ec t\u1ef1 \u0111\u1ed9ng \u0111\u1ed5 l\u1ed7i cho ch\u00ednh linh ki\u1ec7n. Tu\u1ed5i th\u1ecd ng\u1eafn h\u01a1n c\u00f3 th\u1ec3 do nhi\u1ec7t \u0111\u1ed9 cao, nhi\u1ec5m b\u1ea9n, \u0111i\u1ec7n \u00e1p kh\u00f4ng \u1ed5n \u0111\u1ecbnh, sai l\u1ec7ch ho\u1eb7c v\u1ea5n \u0111\u1ec1 l\u1eafp \u0111\u1eb7t tr\u00ean m\u1ed9t d\u00e2y chuy\u1ec1n. Do \u0111\u00f3, c\u00e1c nh\u00f3m b\u1ea3o tr\u00ec n\u00ean xem x\u00e9t MTTF c\u00f9ng v\u1edbi ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c v\u00e0 b\u1ed1i c\u1ea3nh v\u1eadn h\u00e0nh, \u0111\u1eb7c bi\u1ec7t khi c\u00f9ng m\u1ed9t m\u00e3 linh ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau tr\u00ean c\u00e1c thi\u1ebft b\u1ecb. Tr\u00ean th\u1ef1c t\u1ebf, MTTF h\u1eefu \u00edch nh\u1ea5t khi n\u00f3 d\u1eabn \u0111\u1ebfn m\u1ed9t quy\u1ebft \u0111\u1ecbnh c\u1ee5 th\u1ec3: thay th\u1ebf s\u1edbm h\u01a1n, ki\u1ec3m tra m\u00f4i tr\u01b0\u1eddng ho\u1eb7c xem x\u00e9t ch\u1ea5t l\u01b0\u1ee3ng nh\u00e0 cung c\u1ea5p.<\/p>\n\n\n\n

<\/span>S\u1eed d\u1ee5ng MTTF \u0111\u1ec3 thi\u1ebft l\u1eadp m\u1ee9c t\u1ed3n kho ph\u1ee5 t\u00f9ng thay th\u1ebf.<\/span><\/h3>\n\n\n\n

MTTF c\u0169ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n l\u1eadp k\u1ebf ho\u1ea1ch ph\u1ee5 t\u00f9ng<\/strong> B\u1edfi v\u00ec n\u00f3 cung c\u1ea5p cho b\u1ed9 ph\u1eadn mua s\u1eafm v\u00e0 b\u1ea3o tr\u00ec m\u1ed9t d\u1ef1 b\u00e1o ti\u00eau th\u1ee5 th\u1ef1c t\u1ebf h\u01a1n. N\u1ebfu m\u1ed9t nh\u00e0 m\u00e1y s\u1eed d\u1ee5ng 20 b\u1ed9 l\u1ecdc gi\u1ed1ng h\u1ec7t nhau v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng trung b\u00ecnh (MTTF) c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng l\u00e0 3.000 gi\u1edd, nh\u00f3m c\u00f3 th\u1ec3 \u01b0\u1edbc t\u00ednh nhu c\u1ea7u thay th\u1ebf d\u1ef1 ki\u1ebfn trong qu\u00fd ti\u1ebfp theo d\u1ef1a tr\u00ean th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng th\u1ef1c t\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean c\u00e1c gi\u1ea3 \u0111\u1ecbnh s\u1eed d\u1ee5ng h\u00e0ng n\u0103m s\u01a1 b\u1ed9. \u0110i\u1ec1u \u0111\u00f3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1ecb r\u00e0ng bu\u1ed9c ti\u1ec1n m\u1eb7t v\u00e0o h\u00e0ng t\u1ed3n kho d\u01b0 th\u1eeba trong khi v\u1eabn \u0111\u1ea3m b\u1ea3o th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng cho c\u00e1c v\u1eadt t\u01b0 ti\u00eau hao quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 m\u00e1y c\u00f3 s\u1ea3n l\u01b0\u1ee3ng l\u1edbn, ngay c\u1ea3 m\u1ed9t c\u1ea3i ti\u1ebfn nh\u1ecf trong d\u1ef1 b\u00e1o c\u0169ng c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed l\u01b0u kho, th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb 20% \u0111\u1ebfn 30% gi\u00e1 tr\u1ecb h\u00e0ng t\u1ed3n kho m\u1ed7i n\u0103m khi bao g\u1ed3m chi ph\u00ed l\u01b0u tr\u1eef, l\u1ed7i th\u1eddi v\u00e0 x\u1eed l\u00fd.<\/p>\n\n\n\n

\"Infographic<\/figure>\n\n\n\n

Quy\u1ebft \u0111\u1ecbnh v\u1ec1 th\u1eddi \u0111i\u1ec3m thay th\u1ebf v\u00e0 d\u1ef1 tr\u1eef c\u0169ng c\u1ea7n ph\u1ea3n \u00e1nh m\u1ee9c \u0111\u1ed9 quan tr\u1ecdng, th\u1eddi gian giao h\u00e0ng v\u00e0 h\u1eadu qu\u1ea3 c\u1ee7a s\u1ef1 c\u1ed1. M\u1ed9t c\u1ea7u ch\u00ec gi\u00e1 r\u1ebb v\u1edbi th\u1eddi gian giao h\u00e0ng n\u1ed9i \u0111\u1ecba m\u1ed9t ng\u00e0y kh\u00f4ng c\u1ea7n logic d\u1ef1 tr\u1eef t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t c\u1ea3m bi\u1ebfn chuy\u00ean d\u1ee5ng nh\u1eadp kh\u1ea9u v\u1edbi th\u1eddi gian giao h\u00e0ng t\u1eeb 8 \u0111\u1ebfn 12 tu\u1ea7n. MTTF gi\u00fap b\u1ea1n \u01b0\u1edbc t\u00ednh nhu c\u1ea7u c\u00f3 th\u1ec3 x\u1ea3y ra, nh\u01b0ng \u0111i\u1ec3m \u0111\u1eb7t h\u00e0ng l\u1ea1i c\u0169ng c\u1ea7n t\u00ednh \u0111\u1ebfn s\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng v\u00e0 r\u1ee7i ro t\u1eeb nh\u00e0 cung c\u1ea5p. N\u00f3i c\u00e1ch kh\u00e1c, MTTF cho b\u1ea1n bi\u1ebft t\u1ed1c \u0111\u1ed9 ti\u00eau th\u1ee5 linh ki\u1ec7n; k\u1ebf ho\u1ea1ch v\u1eadn h\u00e0nh quy\u1ebft \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 kh\u00f4ng ch\u1eafc ch\u1eafn m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn.<\/p>\n\n\n\n

<\/span>Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c (MTTF) theo t\u1eebng d\u00f2ng s\u1ea3n ph\u1ea9m, nh\u00e0 cung c\u1ea5p v\u00e0 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh.<\/span><\/h3>\n\n\n\n

S\u1ed1 li\u1ec7u trung b\u00ecnh to\u00e0n nh\u00e0 m\u00e1y c\u00f3 th\u1ec3 che gi\u1ea5u v\u1ea5n \u0111\u1ec1 th\u1ef1c s\u1ef1, v\u00ec v\u1eady c\u1ea7n ph\u00e2n kh\u00fac th\u1ecb tr\u01b0\u1eddng. MTTF<\/a><\/strong> Gi\u00e1 tr\u1ecb th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf \u0111\u00f3. N\u1ebfu c\u00f4ng t\u1eafc c\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch c\u1ee7a m\u1ed9t nh\u00e0 cung c\u1ea5p n\u00e0o \u0111\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t th\u00ec... 6.200 gi\u1edd<\/strong> tr\u00ean Tuy\u1ebfn A nh\u01b0ng ch\u1ec9 3.900 gi\u1edd<\/strong> Tr\u00ean d\u00e2y chuy\u1ec1n C, s\u1ef1 ch\u00eanh l\u1ec7ch c\u00f3 th\u1ec3 ph\u1ea3n \u00e1nh \u0111i\u1ec1u ki\u1ec7n v\u1ec7 sinh kh\u1eafc nghi\u1ec7t h\u01a1n, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 l\u1eafp r\u00e1p ho\u1eb7c ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u v\u00e0o kh\u00f4ng nh\u1ea5t qu\u00e1n. Ch\u1ec9 nh\u00ecn v\u00e0o m\u1ee9c trung b\u00ecnh t\u1ed5ng h\u1ee3p s\u1ebd che khu\u1ea5t m\u00f4 h\u00ecnh \u0111\u00f3 v\u00e0 d\u1eabn \u0111\u1ebfn c\u00e1c quy\u1ebft \u0111\u1ecbnh d\u1ef1 tr\u1eef v\u00e0 t\u00ecm ngu\u1ed3n cung \u1ee9ng sai l\u1ea7m. \u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MTTF v\u00e0 MTBF l\u1ea1i quan tr\u1ecdng v\u1ec1 m\u1eb7t v\u1eadn h\u00e0nh: \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn ti\u00eau hao ho\u1eb7c kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa, b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 tu\u1ed5i th\u1ecd theo t\u1eebng nh\u00f3m s\u1ea3n ph\u1ea9m, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ee9c trung b\u00ecnh theo chu k\u1ef3 s\u1eeda ch\u1eefa.<\/p>\n\n\n\n

Ph\u00e2n \u0111o\u1ea1n c\u0169ng h\u1ed7 tr\u1ee3 vi\u1ec7c xem x\u00e9t nh\u00e0 cung c\u1ea5p d\u1ef1a tr\u00ean b\u1eb1ng ch\u1ee9ng. Khi MTTF gi\u1ea3m \u0111\u1ed1i v\u1edbi m\u1ed9t l\u00f4 h\u00e0ng c\u1ee7a nh\u00e0 cung c\u1ea5p ho\u1eb7c m\u1ed9t khu v\u1ef1c s\u1ea3n xu\u1ea5t, b\u1ed9 ph\u1eadn mua s\u1eafm c\u00f3 th\u1ec3 b\u00e1o c\u00e1o v\u1ea5n \u0111\u1ec1 v\u1edbi d\u1eef li\u1ec7u v\u1ec1 tu\u1ed5i th\u1ecd s\u1ea3n ph\u1ea9m, th\u1eddi \u0111i\u1ec3m x\u1ea3y ra l\u1ed7i v\u00e0 c\u00e1c d\u00e2y chuy\u1ec1n b\u1ecb \u1ea3nh h\u01b0\u1edfng. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra c\u01a1 s\u1edf v\u1eefng ch\u1eafc h\u01a1n cho vi\u1ec7c thay \u0111\u1ed5i quy tr\u00ecnh ki\u1ec3m tra \u0111\u1ea7u v\u00e0o, y\u00eau c\u1ea7u b\u1ea3o h\u00e0nh ho\u1eb7c t\u00ecm ngu\u1ed3n cung \u1ee9ng thay th\u1ebf. \u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 \u0111\u1ed9 tin c\u1eady, \u0111i\u1ec1u n\u00e0y bi\u1ebfn MTTF t\u1eeb m\u1ed9t ch\u1ec9 s\u1ed1 b\u00e1o c\u00e1o th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 \u0111\u00e0m ph\u00e1n.<\/p>\n\n\n\n

<\/span>Chu\u1ea9n b\u1ecb t\u1ed1t h\u01a1n cho c\u00e1c \u0111\u1ee3t ng\u1eebng ho\u1ea1t \u0111\u1ed9ng theo k\u1ebf ho\u1ea1ch<\/span><\/h3>\n\n\n\n

Vi\u1ec7c chu\u1ea9n b\u1ecb ng\u1eebng ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n khi d\u1eef li\u1ec7u MTTF \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eadp s\u1eb5n danh s\u00e1ch thay th\u1ebf. Tr\u01b0\u1edbc khi ng\u1eebng ho\u1ea1t \u0111\u1ed9ng h\u00e0ng th\u00e1ng ho\u1eb7c h\u00e0ng qu\u00fd, c\u00e1c nh\u00f3m c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c b\u1ed9 ph\u1eadn s\u1eafp h\u1ebft tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn v\u00e0 thay th\u1ebf ch\u00fang trong khi v\u1eabn c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c, thay v\u00ec ch\u1edd \u0111\u1ebfn khi x\u1ea3y ra s\u1ef1 c\u1ed1 trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 l\u1ecdc, pin, c\u1ea3m bi\u1ebfn nh\u1ecf v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c c\u00f3 gi\u00e1 th\u00e0nh th\u1ea5p khi thay th\u1ebf ri\u00eang l\u1ebb nh\u01b0ng l\u1ea1i g\u00e2y gi\u00e1n \u0111o\u1ea1n nghi\u00eam tr\u1ecdng khi h\u1ecfng h\u00f3c b\u1ea5t ng\u1edd. K\u1ebft qu\u1ea3 l\u00e0 gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c kh\u1ea9n c\u1ea5p, l\u1eadp k\u1ebf ho\u1ea1ch nh\u00e2n l\u1ef1c t\u1ed1t h\u01a1n v\u00e0 ph\u1ea1m vi ng\u1eebng ho\u1ea1t \u0111\u1ed9ng d\u1ec5 d\u1ef1 \u0111o\u00e1n h\u01a1n.<\/p>\n\n\n\n

\u0110i\u1ec1u m\u1ea5u ch\u1ed1t l\u00e0 tr\u00e1nh coi MTTF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng) nh\u01b0 m\u1ed9t h\u1ea1n ch\u00f3t c\u1ed1 \u0111\u1ecbnh. Tu\u1ed5i th\u1ecd th\u1ef1c t\u1ebf lu\u00f4n thay \u0111\u1ed5i, v\u00ec v\u1eady ch\u1ec9 s\u1ed1 n\u00e0y n\u00ean x\u00e1c \u0111\u1ecbnh m\u1ed9t kho\u1ea3ng th\u1eddi gian l\u1eadp k\u1ebf ho\u1ea1ch ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111i\u1ec3m h\u1ecfng tuy\u1ec7t \u0111\u1ed1i. Nhi\u1ec1u nh\u00f3m s\u1eed d\u1ee5ng t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn, ch\u1eb3ng h\u1ea1n nh\u01b0 xem x\u00e9t c\u00e1c b\u1ed9 ph\u1eadn \u1edf m\u1ee9c 70% \u0111\u1ebfn 80% d\u1ef1a tr\u00ean MTTF l\u1ecbch s\u1eed, sau \u0111\u00f3 \u0111i\u1ec1u ch\u1ec9nh theo m\u1ee9c \u0111\u1ed9 quan tr\u1ecdng v\u00e0 \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng. \u0110\u00f3 l\u00e0 m\u1ed9t quy t\u1eafc b\u1ea3o tr\u00ec th\u1ef1c t\u1ebf h\u01a1n so v\u1edbi vi\u1ec7c thay th\u1ebf m\u1ecdi b\u1ed9 ph\u1eadn qu\u00e1 s\u1edbm ho\u1eb7c ch\u1edd \u0111\u1ebfn khi h\u1ebft h\u00e0ng v\u00e0 h\u1ecfng h\u00f3c bu\u1ed9c ph\u1ea3i \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n\n\n\n

<\/span>C\u00e1ch theo d\u00f5i MTTF trong s\u1ea3n xu\u1ea5t b\u1eb1ng quy tr\u00ecnh l\u00e0m vi\u1ec7c v\u00e0 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n k\u1ef9 thu\u1eadt s\u1ed1<\/span><\/h2>\n\n\n\n

<\/span>S\u1eed d\u1ee5ng ngu\u1ed3n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady.<\/span><\/h3>\n\n\n\n

N\u1ebfu b\u1ea1n mu\u1ed1n Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng (MTTF)<\/strong><\/a> \u0110\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c quy\u1ebft \u0111\u1ecbnh b\u1ea3o tr\u00ec th\u1ef1c t\u1ebf, vi\u1ec7c t\u00ednh to\u00e1n ph\u1ea3i b\u1eaft \u0111\u1ea7u t\u1eeb d\u1eef li\u1ec7u ngu\u1ed3n \u0111\u00e1ng tin c\u1eady. T\u1ed1i thi\u1ec3u, c\u00e1c nh\u00e0 m\u00e1y n\u00ean thu th\u1eadp ID t\u00e0i s\u1ea3n, s\u1ed1 hi\u1ec7u ph\u1ee5 t\u00f9ng ho\u1eb7c lo\u1ea1i ph\u1ee5 t\u00f9ng, s\u1ed1 gi\u1edd ho\u1ea1t \u0111\u1ed9ng, ng\u00e0y x\u1ea3y ra s\u1ef1 c\u1ed1, d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, nh\u00e0 cung c\u1ea5p v\u00e0 m\u00e3 l\u1ed7i cho m\u1ed7i linh ki\u1ec7n b\u1ecb h\u1ecfng. N\u1ebfu thi\u1ebfu c\u1ea5u tr\u00fac \u0111\u00f3, ngay c\u1ea3 khi b\u1ea1n bi\u1ebft c\u00e1ch t\u00ednh MTTF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c), k\u1ebft qu\u1ea3 s\u1ebd qu\u00e1 nhi\u1ec5u \u0111\u1ec3 so s\u00e1nh gi\u1eefa c\u00e1c d\u00e2y chuy\u1ec1n, nh\u00e0 cung c\u1ea5p ho\u1eb7c nh\u00f3m ph\u1ee5 t\u00f9ng.<\/p>\n\n\n\n

D\u1eef li\u1ec7u th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o th\u1eddi gian th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch tu\u1ed5i th\u1ecd c\u1ee7a linh ki\u1ec7n. M\u1ed9t c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean d\u00e2y chuy\u1ec1n h\u00e0n ho\u1ea1t \u0111\u1ed9ng ba ca s\u1ebd b\u1ecb hao m\u00f2n nhanh h\u01a1n nhi\u1ec1u so v\u1edbi c\u00f9ng m\u1ed9t m\u1eabu c\u1ea3m bi\u1ebfn \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean tr\u1ea1m d\u1ef1 ph\u00f2ng ho\u1ea1t \u0111\u1ed9ng v\u1edbi t\u1ea3i tr\u1ecdng th\u1ea5p h\u01a1n. \u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MTTF v\u00e0 MTBF l\u1ea1i quan tr\u1ecdng trong v\u1eadn h\u00e0nh: \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa, b\u1ea1n c\u1ea7n c\u00f3 h\u1ed3 s\u01a1 v\u1ec1 s\u1ef1 c\u1ed1 v\u00e0 thay th\u1ebf \u1edf c\u1ea5p \u0111\u1ed9 b\u1ed9 ph\u1eadn, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 nh\u1eadt k\u00fd th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

<\/span>Chu\u1ea9n h\u00f3a vi\u1ec7c b\u00e1o c\u00e1o l\u1ed7i ngay t\u1ea1i ngu\u1ed3n.<\/span><\/h3>\n\n\n\n

C\u00e1i s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n c\u1ee7a c\u00e1c b\u00e1o c\u00e1o t\u1ea1i ch\u1ed7<\/strong> \u0111\u00e2y l\u00e0 nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng nh\u1ea5t d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a MTTF<\/strong>. N\u1ebfu m\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean ghi nh\u1eadn l\u1ed7i c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn l\u00e0 \u201cc\u1ea3m bi\u1ebfn h\u1ecfng\u201d, ng\u01b0\u1eddi kh\u00e1c s\u1eed d\u1ee5ng m\u00e3 OEM, v\u00e0 ng\u01b0\u1eddi th\u1ee9 ba ch\u1ec9 ghi l\u1ea1i b\u1eb1ng t\u00ean m\u00e1y, th\u00ec vi\u1ec7c t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u s\u1ebd tr\u1edf n\u00ean kh\u00f3 kh\u0103n. C\u00e1c bi\u1ec3u m\u1eabu di \u0111\u1ed9ng ti\u00eau chu\u1ea9n v\u1edbi c\u00e1c tr\u01b0\u1eddng th\u1ea3 xu\u1ed1ng, th\u00f4ng tin b\u1eaft bu\u1ed9c v\u00e0 t\u1ec7p \u0111\u00ednh k\u00e8m \u1ea3nh gi\u00fap \u0111\u1ea3m b\u1ea3o m\u1ecdi b\u1ea3n ghi l\u1ed7i \u0111\u1ec1u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u0111\u1ec3 ph\u00e2n t\u00edch.<\/p>\n\n\n\n

Tr\u00ean th\u1ef1c t\u1ebf, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 thay th\u1ebf c\u00e1c ghi ch\u00fa tr\u00ean gi\u1ea5y v\u00e0 tin nh\u1eafn kh\u00f4ng ch\u00ednh th\u1ee9c b\u1eb1ng m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c. quy tr\u00ecnh l\u00e0m vi\u1ec7c k\u1ef9 thu\u1eadt s\u1ed1 c\u00f3 c\u1ea5u tr\u00fac<\/strong>. M\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean qu\u00e9t m\u00e3 v\u1ea1ch c\u1ee7a t\u00e0i s\u1ea3n ho\u1eb7c ph\u1ee5 t\u00f9ng thay th\u1ebf, ch\u1ecdn m\u00e3 l\u1ed7i, nh\u1eadp s\u1ed1 li\u1ec7u th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng, x\u00e1c nh\u1eadn l\u00f4 h\u00e0ng c\u1ee7a nh\u00e0 cung c\u1ea5p (n\u1ebfu c\u00f3) v\u00e0 g\u1eedi b\u1ea3n ghi t\u1eeb d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t. C\u1ea5u tr\u00fac n\u00e0y gi\u00fap vi\u1ec7c t\u00ednh to\u00e1n MTTF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c) tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 cho ph\u00e9p s\u1eed d\u1ee5ng MTTF \u0111\u1ec3 c\u1ea3i thi\u1ec7n k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec thay v\u00ec ch\u1ec9 coi \u0111\u00f3 nh\u01b0 m\u1ed9t b\u00e0i t\u1eadp tr\u00ean b\u1ea3ng t\u00ednh.<\/p>\n\n\n\n

<\/span>K\u1ebft n\u1ed1i d\u1eef li\u1ec7u l\u1ed7i, l\u1ec7nh c\u00f4ng vi\u1ec7c v\u00e0 h\u00e0ng t\u1ed3n kho.<\/span><\/h3>\n\n\n\n

\u0110\u00e2y l\u00e0 l\u00fac thi\u1ebft k\u1ebf quy tr\u00ecnh l\u00e0m vi\u1ec7c quan tr\u1ecdng h\u01a1n ch\u00ednh c\u00f4ng th\u1ee9c. V\u1edbi Jodoo<\/strong><\/a>, M\u1ed9t nh\u00e0 m\u00e1y c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c bi\u1ec3u m\u1eabu k\u1ebft n\u1ed1i \u0111\u1ec3 ghi nh\u1eadt k\u00fd l\u1ed7i, c\u1ea5p ph\u00e1t ph\u1ee5 t\u00f9ng thay th\u1ebf v\u00e0 l\u1ec7nh c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec, sao cho m\u1ed9t s\u1ef1 ki\u1ec7n t\u1ef1 \u0111\u1ed9ng c\u1eadp nh\u1eadt nhi\u1ec1u b\u1ea3n ghi. Khi m\u1ed9t b\u1ed9 ph\u1eadn b\u1ecb l\u1ed7i \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o, quy tr\u00ecnh l\u00e0m vi\u1ec7c c\u00f3 th\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng h\u00e0ng t\u1ed3n kho ph\u1ee5 t\u00f9ng, k\u00edch ho\u1ea1t xem x\u00e9t c\u1ee7a ng\u01b0\u1eddi gi\u00e1m s\u00e1t \u0111\u1ed1i v\u1edbi c\u00e1c l\u1ed7i b\u1ea5t th\u01b0\u1eddng v\u00e0 cung c\u1ea5p d\u1eef li\u1ec7u cho b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n theo d\u00f5i th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c (MTTF) theo d\u00e2y chuy\u1ec1n, nh\u00e0 cung c\u1ea5p v\u00e0 lo\u1ea1i linh ki\u1ec7n.<\/p>\n\n\n\n

\"S\u01a1<\/figure>\n\n\n\n

V\u00ec d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t h\u1ec7 th\u1ed1ng duy nh\u1ea5t, n\u00ean c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1ed9 tin c\u1eady kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng l\u1ea1i th\u1ee7 c\u00f4ng v\u00e0o cu\u1ed1i th\u00e1ng. Jodoo<\/strong><\/a> B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 t\u00ednh to\u00e1n v\u00e0 hi\u1ec3n th\u1ecb c\u00e1c xu h\u01b0\u1edbng nh\u01b0 tu\u1ed5i th\u1ecd trung b\u00ecnh theo t\u1eebng m\u1eabu c\u1ea3m bi\u1ebfn, s\u1ed1 l\u1ea7n h\u1ecfng h\u00f3c l\u1eb7p l\u1ea1i trong v\u00f2ng 30 ng\u00e0y, ho\u1eb7c th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c (MTTF) theo l\u00f4 h\u00e0ng c\u1ee7a nh\u00e0 cung c\u1ea5p, v\u1edbi kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb theo vai tr\u00f2 d\u00e0nh cho c\u00e1c nh\u00e0 l\u00e3nh \u0111\u1ea1o b\u1ea3o tr\u00ec, mua h\u00e0ng v\u00e0 s\u1ea3n xu\u1ea5t. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i cho c\u00e1c nh\u00f3m m\u1ed9t c\u1ea7u n\u1ed1i thi\u1ebft th\u1ef1c gi\u1eefa vi\u1ec7c theo d\u00f5i s\u1ed1 li\u1ec7u, b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean l\u00e0 t\u00ednh to\u00e1n MTTF m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, v\u00e0 b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 h\u00e0nh \u0111\u1ed9ng d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3.<\/p>\n\n\n\n

<\/span>M\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1eeb m\u1ed9t nh\u00e0 cung c\u1ea5p ph\u1ee5 t\u00f9ng \u00f4 t\u00f4<\/span><\/h3>\n\n\n\n

M\u1ed9t nh\u00e0 cung c\u1ea5p ph\u1ee5 t\u00f9ng \u00f4 t\u00f4 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng n\u00e0y \u0111\u1ec3 theo d\u00f5i c\u00e1c c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n tr\u00ean nhi\u1ec1u d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p. K\u1ef9 thu\u1eadt vi\u00ean b\u00e1o c\u00e1o l\u1ed7i th\u00f4ng qua bi\u1ec3u m\u1eabu tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng, ng\u01b0\u1eddi ph\u1ee5 tr\u00e1ch b\u1ea3o tr\u00ec ph\u00ea duy\u1ec7t h\u1ed3 s\u01a1 thay th\u1ebf, v\u00e0 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n nh\u00f3m c\u00e1c l\u1ed7i theo l\u00f4 c\u1ee7a nh\u00e0 cung c\u1ea5p v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng c\u1ee7a d\u00e2y chuy\u1ec1n. Trong v\u00f2ng v\u00e0i tu\u1ea7n, nh\u00f3m c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng m\u1ed9t l\u00f4 c\u1ea3m bi\u1ebfn \u0111ang b\u1ecb l\u1ed7i v\u1edbi tu\u1ed5i th\u1ecd trung b\u00ecnh ng\u1eafn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi c\u00e1c l\u00f4 h\u00e0ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, cho ph\u00e9p b\u1ed9 ph\u1eadn mua h\u00e0ng t\u1ea1m d\u1eebng c\u00e1c \u0111\u01a1n \u0111\u1eb7t h\u00e0ng m\u1edbi v\u00e0 l\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p thay th\u1ebf tr\u01b0\u1edbc khi v\u1ea5n \u0111\u1ec1 g\u00e2y ra s\u1ef1 gi\u00e1n \u0111o\u1ea1n d\u00e2y chuy\u1ec1n.<\/p>\n\n\n\n

Kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb th\u00f4ng tin nh\u01b0 v\u1eady ch\u00ednh l\u00e0 \u0111i\u1ec1u bi\u1ebfn MTTF t\u1eeb m\u1ed9t ch\u1ec9 s\u1ed1 KPI t\u0129nh th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3. Thay v\u00ec tranh lu\u1eadn xem gi\u00e1 tr\u1ecb th\u1ea5p c\u00f3 ph\u1ea3i l\u00e0 ng\u1eabu nhi\u00ean hay kh\u00f4ng, nh\u00f3m c\u00f3 th\u1ec3 ph\u00e2n t\u00edch s\u00e2u h\u01a1n v\u1ec1 d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, nh\u00e0 cung c\u1ea5p v\u00e0 m\u00f4 h\u00ecnh l\u1ed7i \u0111\u1eb1ng sau \u0111\u00f3. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 m\u00e1y qu\u1ea3n l\u00fd h\u00e0ng tr\u0103m ho\u1eb7c h\u00e0ng ngh\u00ecn linh ki\u1ec7n ti\u00eau hao, m\u1ee9c \u0111\u1ed9 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c n\u00e0y th\u01b0\u1eddng l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh gi\u1eefa vi\u1ec7c thay th\u1ebf th\u1ee5 \u0111\u1ed9ng v\u00e0 ki\u1ec3m so\u00e1t \u0111\u1ed9 tin c\u1eady m\u1ed9t c\u00e1ch c\u00f3 k\u1ef7 lu\u1eadt.<\/p>\n\n\n\n

<\/span>K\u1ebft lu\u1eadn: H\u00e3y chuy\u1ec3n MTTF t\u1eeb m\u1ed9t c\u00f4ng th\u1ee9c th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng b\u1ea3o tr\u00ec t\u1ed1t h\u01a1n.<\/span><\/h2>\n\n\n\n

Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng<\/a><\/strong> MTTF (Th\u1eddi gian trung b\u00ecnh \u0111\u1ec3 x\u1ea3y ra s\u1ef1 c\u1ed1) h\u1eefu \u00edch nh\u1ea5t khi n\u00f3 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 b\u00e1o c\u00e1o m\u00e0 c\u00f2n gi\u00fap \u0111\u1ecbnh h\u00ecnh c\u00e1c quy\u1ebft \u0111\u1ecbnh b\u1ea3o tr\u00ec h\u00e0ng ng\u00e0y. \u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 b\u1ea3o tr\u00ec v\u00e0 \u0111\u1ed9 tin c\u1eady, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 s\u1eed d\u1ee5ng MTTF \u0111\u1ec3 thi\u1ebft l\u1eadp kho\u1ea3ng th\u1eddi gian thay th\u1ebf th\u00f4ng minh h\u01a1n, x\u00e1c \u0111\u1ecbnh c\u00e1c nh\u00f3m linh ki\u1ec7n y\u1ebfu, xem x\u00e9t hi\u1ec7u su\u1ea5t c\u1ee7a nh\u00e0 cung c\u1ea5p v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch t\u1ed3n kho ph\u1ee5 t\u00f9ng thay th\u1ebf v\u1edbi \u0111\u1ed9 tin c\u1eady cao h\u01a1n. Tr\u00ean th\u1ef1c t\u1ebf, MTTF gi\u1ea3m th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o s\u1edbm r\u1eb1ng m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, l\u00f4 h\u00e0ng c\u1ee7a nh\u00e0 cung c\u1ea5p ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa \u00fd tr\u01b0\u1edbc khi c\u00e1c s\u1ef1 c\u1ed1 b\u1eaft \u0111\u1ea7u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n l\u01b0\u1ee3ng, ch\u1ea5t l\u01b0\u1ee3ng ho\u1eb7c chi ph\u00ed b\u1ea3o tr\u00ec.<\/p>\n\n\n\n

\u0110i\u1ec3m m\u1ea5u ch\u1ed1t r\u1ea5t \u0111\u01a1n gi\u1ea3n: MTTF gi\u00fap b\u1ea1n l\u1eadp k\u1ebf ho\u1ea1ch<\/strong>, Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 \u0111o l\u01b0\u1eddng. Khi b\u1ea1n theo d\u00f5i n\u00f3 m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n c\u00f9ng v\u1edbi c\u00e1c ch\u1ec9 s\u1ed1 nh\u01b0 MTBF v\u00e0 MTTR, b\u1ea1n s\u1ebd c\u00f3 c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng h\u01a1n v\u1ec1 nh\u1eefng b\u1ed9 ph\u1eadn n\u00e0o c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf ch\u1ee7 \u0111\u1ed9ng, nh\u1eefng b\u1ed9 ph\u1eadn n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u1ef1 tr\u1eef ti\u1ebft ki\u1ec7m h\u01a1n v\u00e0 c\u00e1c m\u00f4 h\u00ecnh h\u1ecfng h\u00f3c \u0111ang b\u1eaft \u0111\u1ea7u thay \u0111\u1ed5i \u1edf \u0111\u00e2u. \u0110i\u1ec1u \u0111\u00f3 l\u00e0m cho MTTF c\u00f3 gi\u00e1 tr\u1ecb kh\u00f4ng ch\u1ec9 \u0111\u1ed1i v\u1edbi ph\u00e2n t\u00edch \u0111\u1ed9 tin c\u1eady m\u00e0 c\u00f2n \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, quy\u1ebft \u0111\u1ecbnh mua h\u00e0ng v\u00e0 ph\u1ed1i h\u1ee3p \u0111a ch\u1ee9c n\u0103ng gi\u1eefa b\u1ea3o tr\u00ec, kho v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n mu\u1ed1n hi\u1ec3n th\u1ecb MTTF trong ho\u1ea1t \u0111\u1ed9ng h\u00e0ng ng\u00e0y, Jodoo<\/a><\/strong> c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng quy tr\u00ecnh b\u1ea3o tr\u00ec kh\u00f4ng c\u1ea7n l\u1eadp tr\u00ecnh, s\u1ed1 h\u00f3a quy tr\u00ecnh phi\u1ebfu y\u00eau c\u1ea7u c\u00f4ng vi\u1ec7c v\u00e0 ph\u1ee5 t\u00f9ng thay th\u1ebf, \u0111\u1ed3ng th\u1eddi gi\u00e1m s\u00e1t c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1ed9 tin c\u1eady tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian th\u1ef1c m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u1ea1i tu h\u1ec7 th\u1ed1ng CMMS ph\u1ee9c t\u1ea1p. B\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed<\/a><\/strong> ho\u1eb7c \u0110\u1eb7t l\u1ecbch d\u00f9ng th\u1eed<\/a><\/strong> \u0110\u1ec3 xem n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng b\u1ea3o tr\u00ec c\u1ee7a b\u1ea1n nh\u01b0 th\u1ebf n\u00e0o.<\/p>","protected":false},"excerpt":{"rendered":"

T\u00ecm hi\u1ec3u v\u1ec1 Th\u1eddi gian trung b\u00ecnh \u0111\u1ebfn khi h\u1ecfng h\u00f3c (MTTF), c\u00e1ch t\u00ednh to\u00e1n v\u00e0 s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec t\u1ed1t h\u01a1n. Xem Jodoo gi\u00fap b\u1ea1n nh\u01b0 th\u1ebf n\u00e0o\u2014b\u1eaft \u0111\u1ea7u d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed.<\/p>","protected":false},"author":1,"featured_media":8501,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solutions"],"blocksy_meta":[],"yoast_head":"\nMean Time to Failure (MTTF): Definition, Formula, and How to Use It in Maintenance Planning - Jodoo Blog<\/title>\n<meta name=\"description\" content=\"Learn Mean Time to Failure (MTTF), how to calculate it, and use it to plan maintenance better. 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