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Why is a FRACAS an Important Reliability Task?
The following table, published in 1995 by what is now the Reliability Information Analysis Center (RIAC), is based on a survey of reliability tasks.1 This study revealed that nearly 90 percent of respondents viewed a FRACAS as the most important reliability task.
Most important tasks based on normalized score
Rank
Task
Normalized Score
1
FRACAS
88.3
2
Design Reviews
83.8
3
Subcontractor/Vendor Control
72.1
4
Parts Control
71.2
5
FMECA
70.3
6
Reliability Qualification Test
68.5
7
Predictions
62.2
8
Test, Analyze and Fix (TAAF)
59.5
9
Thermal Analysis
58.6
10
ESS
54.1
A FRACAS is rated as such a highly important and effective reliability task because of its ability to feed root cause and corrective action information back into the design process to further improve design reliability. And, as the study points out, early elimination of root causes are a major contributor to product reliability growth and attaining customer satisfaction following product/service delivery.
1 Criscimagna, N., “Benchmarking Commercial Reliability Practices,” Product Code BENCH, Reliability Analysis Center, July 1995.