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The Uncoupling of the Sandia Administrative Computing System - A Case Study in Statistical Process Control

Summary: [This abstract is based on the author's abstract.]

In the fall of 1982 and the spring of 1983, Sandia National Laboratories experienced significant problems with instability in the administrative computing system. Solutions to the problems were attempted during this period, but a major increase in system reliability was achieved only when a major change in process was implemented through a separation of the dual processor system into two single processors. While it was not apparent at the time, it is clear that before and after the uncoupling of the dual processor, the overall system was statistically in control. After the separation, the service level provided by the two processors and the variation in service level were improved. The system remained statistically stable.

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  • Topics: Reliability, Statistical Process Control (SPC)
  • Keywords: Case study, Shewhart control chart, Reliability, Computers, Systems analysis, Statistical process control (SPC)
  • Author: Benson, Merle J.
  • Journal: Quality Engineering