The Scope property is used to attach a diagnostic study to a specific Operating Mode of the design. This Operating Mode can be used to restrict analysis to a subset of the specified design, as well as supply a duty cycle list to be used in calculating adjusted failure rates.
The default scope is <Entire Design>, which indicates that the diagnostics developed in that study will attempt to fully diagnose the hierarchical design to which that study has been linked. Also, when <Entire Design> is selected, the baseline duty cycle list will be used when the adjusted failure rates are calculated. The Analyst may also select as the Diagnostic Scope any defined Operating Mode, in which case the diagnostics will only attempt to diagnose failures that occur within the subset of the design specified within that Operating Mode. When a specific Operating Mode has been selected as the Diagnostic Scope, the Analyst has the option of deciding whether or not detection statistics are to be scaled to the specified scope (see Scale Statistics to Scope).
How to Set the Scope for a Diagnostic Study
1
Verify that the desired diagnostic study is the active document.
2
Choose the Detail tab within the context panels.
3
On the Detail panel, use the Scope dropbox to select the Operating Mode to which the scope of the diagnostics are to be constrained.
4
If necessary, enable or disable the Scale Statistics to Scope checkbox on the Detail panel (this is only visible when an Operating Mode is selected as the scope).
When a specific Operating Mode has been selected as the Diagnostic Scope, the Analyst has the option of deciding whether or not detection statistics are to be scaled to the specified scope. When this option is enabled (the default case), then the Total Functions Detected and Total Probability Detectedmetrics will be calculated at 100% if every output function in the selected Operating Mode is detected. When disabled, fault detection statistics will be calculated across the entire design (if every function in the Operating Mode were to be detected, for example, the calculated fault detection metrics would indicate the percentage of the overall system that is included in that Operating Mode).
