The process by which requirements are established and managed in controlled documents and databases. Also, a systematic methodology to manage requirements and specification limits in the product design so all customer expectations are met, and so the product can be produced with minimal risk. DFSS is performed in parallel with requirements management.

Benefits
Improved Product Development, Design Quality Measurement, Reduced Financial Risk, Optimized Design for Manufacturing and Reliability, Focus on Producibility
 

ReqM Thought Process
Requirements exist at various levels, especially for complex systems as shown above. The transfer function Y=f(x) relationship is established in the design & analysis phase, whereby “y” is the upper level requirement and “x” is the lower-level requirement (becomes “y” at the next level). Requirements at all levels should be documented as such and traceable, particularly the critical-to-quality and key characteristics.