6 Sigma

A set of techniques and tools for process improvement. Six sigma is characterized by five steps: define, measure, analyze, improve, and control (DMAIC). Design for six sigma expands on six sigma to include a focus on customer expectations or requirements to inform design decisions. It is also a set of tools to solve problems using a define, measure, analyze, design, and verify (DMADV) process. It is a methodology to design robust solutions. Meaning that items can withstand a wide range of applied stress without failure.