Archive for the ‘DMAIC’ Category

Focus on Content, Not Template

Tuesday, February 1st, 2011

I recently co-authored an article summarizing a Six Sigma project. The article was about a Six Sigma project in e-mail marketing in which design of experiments was used.

The project did not exactly follow the Define-Measure-Analyze-Improve-Control or DMAIC as we know it. Instead, The headings of the DMAIC process were as follows:

  • Define / Measure
  • Measure / Analyze
  • Improve
  • Control

The Define/Measurephase includes some Plan-Do-Check-Act cycles in determining and verifying factors to be included. For example, checking feasibility of that certain level combinations can be run. When we move to the Measure/Analyzephase, we are actually collecting and analyzing data based on the experimental design . Sometimes we need to do preliminary analysis before we add more samples and conduct more detailed analysis.

The point is that smaller PDCA cycles are often within each phase and between consecutive phases. The phases of the projects are dynamic in nature and not static. In the end, each project is unique and so should be treated.

Posted in PDCA, PDSA, Plan Do Study Act, Plan Do Check Act, Quality improvement, Six Sigma, DMAIC, Uncategorized | No Comments »

Six Sigma - Tollgates?

Wednesday, September 9th, 2009

Six Sigma is a disciplined method that works in phases. A Six Sigma Black Belt (BB) learns that he/she must complete a phase before going to the next. The phases in order are: Define, Measure, Analyze, Improve, and Control (also known as DMAIC). To ensure that a BB does not go from one phase to the next prematurely, checkpoints (tollgates) are set up. These tollgates might be a number of questions (checklist items) that the Master Black Belt (MBB) or Champion goes through with the BB to ensure satisfaction with the phase. Once completed, the BB can move to the next phase.

After leading and coaching many Six Sigma projects, I found it more natural to go back and fourth between phases. For example, I found myself making a number of iterations among phases (Measure==>Analyze==>Improve==>Measure… and so on). Once the process is improved and measured to meet established goals, it can then move to the Control phase. Feedback to the Define should be open after evaluating process control.

In addition to measuring improvements using appropriate metrics, the real test of success is sustaining such improvements over time.

What is your experience?

Posted in Process Control, DMAIC, Quality Tools, Six Sigma | 1 Comment »