Weibull & Reliability/Failure Time Analysis

Select Weibull analysis & reliability/failure time analysis from the Process Analysis Procedures Startup Panel and click the OK button to display the Weibull & Reliability/Failure Time Analysis dialog. This dialog contains two tabs: Raw data and Grouped data. Use the

Raw data

tab to specify the variables for the Weibull analysis & reliability/failure time analysis if your data set consists of raw failure times, with or without censoring. Use the

Grouped data

tab to specify the variables for the Weibull analysis & reliability/failure time analysis if your data set consists of aggregated or tabulated (grouped) failure times, for example, if your data file consists of a life table. The Introductory Overview discusses the options available for grouped data; see also the Survival Analysis module for a discussion of life tables.

OK
Click the OK button to display either the standard variable selection dialog or the Weibull Analysis: Results (Raw Data) dialog (if variables were already selected via the Raw data tab) or the Weibull Analysis: Results (Grouped Data) dialog (if variables were already selected via the

Grouped data

tab).
Cancel
Click the Cancel button to return to the Process Analysis Procedures Startup Panel.
Options
Click the Options button to display the Options menu.
Select Cases
Click the Select Cases button to display the Analysis/Graph Case Selection Conditions dialog, which is used to create conditions for which cases will be included (or excluded) in the current analysis. More information is available in the case selection conditions overview, syntax summary, and dialog description.
W
Click the W (Weight) button to display the Analysis/Graph Case Weights dialog, which is used to adjust the contribution of individual cases to the outcome of the current analysis by "weighting" those cases in proportion to the values of a selected variable.

For related procedures, see also the Survival Analysis module; for non-censoring (complete) data, you can also use the Quantile-Quantile and Probability-Probability plots from the Stats 2D Graphs menu as well as the distribution fitting options on the

Process Capability Analysis Setup

dialog

- Raw Data: Distribution

tab.