What is Six Sigma, and how does the DMAIC process work? This BAR exam lesson explains Six Sigma — the data-driven process improvement methodology developed at Motorola — including its goal of no more than 3.4 defects per million opportunities, the five DMAIC steps, and how it reduces process variation to improve quality. Built for accounting students and CPA, CMA and EA candidates studying operations management and process improvement.

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Video Timeline & Key Concepts:
0:00 — Origin: Six Sigma developed by Motorola (Bill Smith)
0:36 — Objective: reducing process variation
0:44 — Definition: six standard deviations and 3.4 defects per million
2:44 — The DMAIC methodology: Define, Measure, Analyze, Improve, Control
3:38 — Application across industries and certification

Frequently Asked Questions:

What is Six Sigma?

Six Sigma is a data-driven methodology for process improvement that aims to eliminate defects and reduce variation, targeting no more than 3.4 defects per million opportunities.

What does the term Six Sigma mean?

It refers to a process performing at six standard deviations from the mean, a level of quality so high that defects are extremely rare.

What are the five steps of DMAIC?

DMAIC stands for Define the problem, Measure current performance, Analyze root causes, Improve by implementing solutions, and Control to sustain the gains.

Who developed Six Sigma?

Six Sigma was developed by Motorola in the mid-1980s, and Bill Smith is widely recognized as the father of the concept.

Where is Six Sigma used?

Six Sigma is applied across many industries, including manufacturing, healthcare, and finance, and typically requires specialized training and certification.

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