The Six Sigma methodology DMAIC (Define, Measure, Analyze, Improve and Control) is used to improve an existing process.
Design for Six Sigma is used to design a new product or service.
The methodology used is DMADV (Define, Measure, Analyze, Design and Verify).
Define the goals and customer (internal & external) requirements. What is Critical to Quality.
Measure customer needs and specifications this should include benchmarking competitors.
Analyze the options.