Multiple Failure Modes (Arbitrarily Censored Data)main topic
Multiple Failure Modes (Arbitrarily Censored Data)Many systems have more than one cause of failure. To determine statistics for each failure mode as well as for the overall system, you must record the cause of system failure.
In addition to the start and end columns required for arbitrarily censored data, you must have a column to store the corresponding failure mode. The frequency column is optional.
|
Start |
End |
Frequency |
Failure mode |
|
* 50 55 60 60 65 60 65 . . . and so on |
50 50 60 60 65 65 * 70 . . . and so on |
1 2 1 1 3 1 2 1 . . . and so on |
Motor Impeller Impeller Impeller Motor Motor
Foreign Object . . . and so on |
|
Note |
To represent censored observations in the failure mode column, use an asterisk (*) for numeric columns or a space for text columns. |
Minitab omits rows with missing values from the calculations unless the missing values represent censored observations.