Sometimes they are referred to as upper and lower control limits. They are not specification or tolerance limits. Customer - The receiver of an output of a process, either internal or external to an organization or corporate unit. A customer could be a person, a department, a company, etc. Customer Data Table - A tool for translating customers' words into requirements, quality indicators and features of the product or service.
All data collection is driven by knowledge of the process and guided by statistical principles.
The cycle was first developed by Dr. Walter A. Shewhart but was popularized in Japan in the 1950 by Dr. W. Edwards Deming. Deming's 14 Principles - The foundation of Deming's philosophy. The points are a blend of leadership, management theory, and statistical concepts which highlight the responsibilities of management while enhancing the capacities of employees. Fishbone Chart - See Cause and Effect Chart. Flowchart - A graphical representation of the flow of a process.