Create and Assess the Optimal Design | JMP 13.2

JMP Support 800.450.0135 (US)

Documentation Feedback
Your feedback is important to us. us any comments about our documentation.

Design of Experiments Guide • Accelerated Life Test Designs • Accelerated Life Test Plan Window • Create and Assess the Optimal Design

•

Create and Assess the Optimal Design

Click Make Design to create the optimal design and see results that address the quality of the design. By default, the optimal design is D-optimal. You can change the optimality criterion by selecting the red triangle option ALT Optimality Criterion.

Three new outlines are added to the window: Design, Parameter Variance for Optimal Design, and Optimality Criteria.

Design Outlines

Gives the number of units to be tested at each design setting. For a single factor, the first column gives the levels of the factor. For two factors, the first two columns give the design settings.

Number of units to be tested at each design setting.

Expected Failures

Expected number of failures for the design setting. The expected number is computed using the prior model specification.

All Censored Probability

Probability that none of the units tested at the design setting will fail. The probability is computed using the prior model specification.

Note: The expected failures and censoring probabilities enable you to judge whether your prior specifications are reasonable.

Parameter Variance for Optimal Design

Gives a matrix proportional to the covariance matrix for the estimates of the acceleration model parameters for the optimal design. The calculation assumes that the values specified as Prior Mean are the true parameter values. For more information, see Parameter Variance for Balanced Design.

Note: Compare the values in the Parameter Variance for Optimal Design matrix to those in the Parameter Variance for Balanced Design matrix to determine the extent to which the optimal design reduces the variance of estimates.

Optimality Criteria

Values for three optimality criteria appear:

D-optimality of the design. See Make D-Optimal Design.

Quantile Criterion

Time I-optimality of the design. See Make Time I-Optimal Design.

Probability Criterion

Probability I-optimality of the design. See Make Probability I-Optimal Design.

•

Help created on 9/19/2017