Accelerated Life Testing - Options
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Stat > Reliability/Survival > Accelerated Life Testing > Options

You can estimate the model parameters from the data or enter historical estimates - see Estimating the Model Parameters for more information.

Dialog box items

Estimate model parameters: Choose to estimate the model parameters from the data.

Use starting estimates: If you have starting estimates, enter one column to be used for all of the response variables, or a separate column for each response variable. The column(s) should contain one value for each coefficient in the regression table, in the order that the coefficients appear in the regression table.

Maximum number of iterations: Enter a positive integer to specify the maximum number of iterations for the Newton-Raphson algorithm.

Set shape (Weibull) or scale (other distributions) at: To estimate other model coefficients while holding the shape or scale parameter fixed, enter one value to be used as the shape or scale parameter for all of the response variables, or a number of values equal to the number of response variables.

Use historical estimates: Choose to enter your own estimates for the model parameters. Enter one column to be used for all of the response variables, or a separate column for each response variable. The column(s) should contain one value for each coefficient in the regression table, in the order that the coefficients appear in the regression table.