Lean Manufacturing and Six Sigma Definitions

Glossary terms, history, people and definitions about Lean and Six Sigma


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The acronym is credited to George T. Doran in a published article in AMA Forum called “There’s a SMART Way to Write Management’s Goals and Objectives

He describes the original list as follows:

  • Specific – target a specific area for improvement.
  • Measurable – quantify or at least suggest an indicator of progress.
  • Assignable – specify who will do it.
  • Realistic – state what results can realistically be achieved, given available resources.
  • Time-related – specify when the result(s) can be achieved.

Over the years, the acronym has changed or morphed. Wikipedia lists this as the most common version of SMART.

  • Specific
  • Measurable
  • Attainable/Achievable – Similar to previous “Realistic”, is it possible to be accomplished
  • Relevant – Does it align to the company values and long-term vision
  • Time-bound



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