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Quality and Reliability Methods - SAS

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294 Degradation Chapter 16<br />

Platform Options<br />

Table 16.3 Degradation Platform Options<br />

Option<br />

Path Definition<br />

Description<br />

The Y variable at a given time is assumed to have a distribution. You can<br />

model the mean, location parameter, or median of that distribution.<br />

Mean Path<br />

is used to model the mean.<br />

Location Parameter Path<br />

is used to model the location parameter.<br />

Median Path is used to model the median of the distribution.<br />

When the Location Parameter or Median Path option is selected, a menu<br />

appears in the Model Specification. Select the distribution of the response<br />

from that menu. See Figure 16.18.<br />

Figure 16.18 Distribution Specification<br />

Degradation Path Style<br />

Provides options for selecting the style of degradation path to fit.<br />

Simple Linear Path is used to fit linear degradation paths, <strong>and</strong> nonlinear<br />

paths that can be transformed to linear. For more information, see<br />

“Simple Linear Path” on page 282.<br />

Nonlinear Path is used to fit nonlinear degradation paths. For more<br />

information, see “Nonlinear Path” on page 284.

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