Linking Fault Isolation Procedures and Symptoms

You can link fault isolation procedures like service workplans or requirements to symptoms. The following scenario is based on tables created from templates presented in the Fault Isolation Templates.

Before you begin: Define a table named Fault Isolation Manual.
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About Testability Analysis
  1. In each causality relationship of the Fault Isolation Manual table:
    1. Drag a symptom from the 3DSearch, the Bookmark Editor, or Process Management in the Maintenance Message cell.
    2. Drag one or more service workplaces or requirements into the Fault Isolation Procedure cell.
  2. In the FMEA table of the system, select the Fault Isolation Procedure cell in a causality relationship.
    A list displays the fault isolation procedures associated with symptoms from Fault Isolation Manual.
  3. Select a fault isolation procedure.
    The fault isolation procedure is associated with the symptoms to which it is already associated in this FMEA table.

The ambiguity groups of the causality relationship are added to the pointer to the Fault Isolation Procedure and provide the following information:

  • Ambiguity Groups: Contains the ambiguity groups of a causality relationship when it is created or reset. It is a persistent, multivalued, string attribute.
  • Ambiguity Group Consistency: A Boolean that is true if and only if the ambiguity groups for the fault isolation procedure are still equal to the ambiguity groups of the causality relationship. This attribute is computed and does not persist. If the ambiguity group of the causality relationship has not been defined, the consistency is false.