Specify the Design Structure

Use the Accelerated Life Test Plan outline to define the model structure and the type of inspection for your design.

Figure 22.16 Initial ALT Design Window 

Number of accelerating Factors

One accelerating factor

Select for a design with one factor.

Two accelerating factors - main effects model

Select for a two factor design for a main effects model

Two accelerating factors - interaction model

Select for a two factor design for a model that contains main effects and an interaction term.

Monitoring Type

Continuous Monitoring

Select for a design with exact failure times recorded. Failure times beyond the length of the test are right censored.

Monitoring at Intervals

Select for a design with units inspected for failures at intervals. Failure times are interval censored. Enter the number of inspections, the time of the first inspection, and the time between inspections. For inspection intervals that are irregular, you can change the inspection times later in the Design Choices outline.

Accelerated Life Test Plan

Specify details about the acceleration factor or factors.