失效模式 - MTBF 說明

 

Main Time Between Failure

 

1. Purpose : To forecast and evaluate new products shipped into channels

                      capable of   utility in normal condition.

 

2. Scope : New product development and 2^nd source component .

 

3. Content : 3.1 MTBF Goal : According To Customer Request ( Ex : 25,000 hours ).

3.2 Confidence Level : ACTR ( Ex : 90% ).

3.3 Sample Size : According To Current Condition ( Ex : 10 UUT ).

3.4 Failure r = 0

3.5 Estimation : GENERAL EXPONENTIAL MODEL

 

                          MTBF = 1 / λ = Total time ( Test ) / Test Ratio