Final answer:
The five-phase improvement process projects that use Six Sigma principles follow is known as DMAIC, which includes Define, Measure, Analyze, Improve, and Control phases.
Step-by-step explanation:
Projects that use Six Sigma principles for quality control normally follow a five-phase improvement process called DMAIC, which stands for Define, Measure, Analyze, Improve, and Control.
During the Define phase, the project goals and customer deliverables are outlined. The Measure phase involves gathering and quantifying data, while the Analyze phase focuses on identifying causes of defects and opportunities for improvement. In the Improve phase, solutions are developed and tested, and during the Control phase, the new processes are implemented and controls are put in place to sustain the improvements.
The spiral design process mentioned in the information provided is an approach to iterative design and can be related to the prototyping, testing, and refinement phases within the DMAIC methodology.