SIPOC is part of 6-sigma's DMAIC model (as part of the design phase). It is sometimes referred to as POCIS (process, output, customers, inputs, suppliers) diagrams or COPIS.
Related: plan quality management
- Wikipedia's article on SIPOC
- TargetTech SearchCIO's definition for SIPOC diagram (suppliers, inputs, process, outputs, customers) posted by Margaret Rouse, contributor: Wendy Schuchart.