Complete the following steps to enter your data. For more information on censored data, go to Data censoring.

- In Variables, enter the columns that contain the failure times or censoring times. You can enter up to 50 columns (for 50 different samples).
- If you have frequency data for each variable, in Frequency columns (optional), enter a column that indicates the number of units for each failure time or censoring time.
- If all the samples are stacked in one column, select By variable and enter a column of grouping indicators. For example, you might enter a column to indicate different locations or a change in design.

In this worksheet, the Time column contains the failure or censoring times. The Censor column contains the censoring indicators: an F designates an actual failure time; a C designates a unit that was removed from the test, and thus censored.

C1 | C2 |
---|---|

Time | Censor |

53 | F |

60 | F |

53 | F |

40 | F |

51 | F |

99 | C |

For information on how to enter the censoring values for the analysis, see the topic "Specify the censoring options".

Specify the distribution analysis for the overview plot:

- Parametric analysis: Fit your data with one of 11 parametric distributions. From Distribution, select a distribution model to use for the overview plots. Base your decision on process knowledge or an evaluation of distribution fit using a distribution ID plot. For more information on choosing a distribution model, go to Distribution fit for reliability analysis.
- Nonparametric analysis: Perform a nonparametric analysis. Use this option when you cannot assume that your data follow a parametric distribution.