Original Date: 09/14/1998
Revision Date: 01/18/2007
Information : Statistical Process Control
In 1993, Raytheon Missile Systems Company (RMSC) formed the Process Improvement Group to identify the company’s manufacturing processes, and review how they contribute to product performance, quality, cost, and schedule. The group, consisting of engineering and manufacturing specialists, also looked at how other companies set up their process control methodologies. Based on RMSC’s culture, the group initiated a seven-step Statistical Process Control (SPC) process.
The SPC process analyzes critical and major processes for implementing process control charting. As shown graphically in Figure 3-3, the process uses various process improvement tools (e.g., flow charts, process maps, pareto charts, design of experiments, regression descriptive statistics) to accomplish this task. In 1996, the group was renamed the Product, Process, and Performance Improvement Group (PPPIG) to reflect its new direction. PPPIG now focuses on six sigma tools and techniques; process characterization and metrics; and sigma card scoring to predict the potential for defects on new product designs.
RMSC’s seven-step SPC process was presented to the operations manager who embraced the concept, and took responsibility for implementing it into various process centers. In addition, PPPIG developed an SPC system manual; a process control technical handbook, and an SPC training curriculum. The group now interacts with engineering and manufacturing teams to provide training and guidance.
Figure 3-3. Seven Step Process
For more information see the
Point of Contact for this survey.