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PDCA cycle – Plan Do Check Act

The Deming cycle, or PDSA cycle, is a continuous quality improvement model consisting of a logical sequence of four repetitive steps for continuous improvement and learning: Plan, Do, Study (Check) and Act. The PDCA cycle is also known as the Deming Cycle, or as the Deming Wheel or as the Continuous Improvement Spiral. It originated in the 1920s with the eminent statistics expert Mr. Walter A. Shewhart, who introduced the concept of PLAN, DO and SEE. The late Total Quality Management (TQM) guru and renowned statistician W. Edwards Deming modified the Shewart cycle as: PLAN, DO, STUDY, and ACT.[ad#ad-4]

Along with the other well-known American quality guru-J.M. Juran, Deming went to Japan as part of the occupation forces of the allies after World War II. Deming taught a lot of Quality Improvement methods to the Japanese, including the usage of statistics and the PLAN, DO, STUDY, ACT cycle.

Benefits of the PDCA cycle:

  • daily routine management-for the individual and/or the team,
  • problem-solving process,
  • project management,
  • continuous development,
  • vendor development,
  • human resources development,
  • new product development, and
  • process trials

PLAN: plan ahead for change. Analyze and predict the results.

DO: execute the plan, taking small steps in controlled circumstances.

STUDY: CHECK, study the results.

ACT: take action to standardize or improve the process.

We also suggest this relevant article if you have time: Frederick Herzberg – Motivation-Hygiene Theory or the Two factor theory


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