For reliability growth data analysis only.
The minimum data requirements for analysis of developmental times-to-failure data are presented next:
Data Type |
Minimum Requirements |
Models |
Failure Times |
At least 3 unique failures. |
Crow-AMSAA, Duane |
Crow Extended: |
||
Grouped Failure Times |
At least 3 unique failures. |
Crow-AMSAA, Duane |
Crow Extended: |
||
Multiple Systems - Known Operating Times |
At least 3 unique failures for overall analysis. |
Crow-AMSAA, Duane |
Crow Extended: |
||
Multiple Systems - Concurrent Operating Times |
At least 3 total failures for overall analysis. |
Crow-AMSAA, Duane |
At least 3 unique failures on an individual system to return individual system results. |
Crow Extended: |
|
Multiple Systems with Dates |
At least 3 total failures for overall analysis. |
Crow-AMSAA, Duane |
At least 3 unique failures on an individual system to return individual system results. |
Crow Extended: |
|
Multiple Systems with Event Codes |
At least 3 total failures for overall analysis. At least 3 unique failures on an individual system to return individual system results. |
Crow Extended: |