Outline of Method
The main steps in the Generic Parts Count method are as follows:
Determine the type and number of each generic part type.
1. Define the proposed system and develop a reliability model.
2. For each block (or area) within the model:
a. Determine the type and number of each generic part type.
b. Calculate the failure rate of each generic part type for the appropriate operational conditions.
c. Sum the failure rates to give the total failure rate for the block (or area).
Evaluate the block (or area) reliability.
3. Combine the block (or area) reliabilities as shown by the reliability model to obtain the total system reliability.
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Some blocks in the reliability model may represent items for which reliability is not time-dependent or is expressed as a probability of success. (See Reliability Modelling.) These blocks must be evaluated separately.
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The Generic Parts Count method is considered in more detail in the following paragraphs, and a completed example is given in Reliability Modelling.