Enter Prior Information and Remaining Specifications

Under Prior Mean, enter your prior acceleration model parameter estimates, rounding the values shown in the Estimates report in Fit Life by X Model for Prior Data to two decimal places:

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Next to Intercept, type 15.88.

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Next to Torque, type -1.87.

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Next to scale, type 0.05.

Open the Prior Variance Matrix outline.

De-select the option Ignore prior variance. Generate the local design for the prior mean.

Enter the estimated covariances from the prior acceleration model, rounding the values shown in the Covariance Matrix report in Fit Life by X Model for Prior Data to five decimal places:

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In the row and column for Intercept, click on 0.10000 and type 0.04570.

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In the row for Intercept and column for Torque, click on 0.00000 and type -0.01062.

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In the row for Intercept and column for scale, click on 0.00000 and type -0.00015.

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In the row and column for Torque, click on 0.10000 and type 0.00248.

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In the row for Torque and column for scale, click on 0.00000 and type 0.00002.

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In the row and column for scale, click on 0.10000 and type 0.00013.

Completed Prior Specification Outline

The test will be conducted over 5000 cycles. However, you are interested in predictions for as many as 10,000 cycles.

Under Diagnostic Choices, enter 10,000 for both boxes for Time range of interest. Leave the Probability of interest value set to 0.1.

This indicates that you are interested in estimating the time by which 10% of the units fail (B10 life).

Under Design Choices, enter 5000 for Length of test.

Enter 100 for Number of units under test.

Completed Design Details Window shows the completed Accelerated Life Test Plan outline.

Completed Design Details Window