According to the PMBOK® Guide, the Plan-Do-Check-Act (PDCA) cycle is a fundamental concept in Project Quality Management. It was popularized by W. Edwards Deming and is the basis for continuous improvement (also known as Kaizen).

The PDCA Cycle:

Plan: Establish the objectives and processes necessary to deliver results in accordance with the expected output.

Do: Implement the plan, execute the process, and make the product.

Check: Study the actual results (measured and collected in " Do " ) and compare against the expected results to ascertain any differences.

Act: Request corrective actions on significant differences between actual and planned results. Analyze the differences to determine their root causes.

Relationship to Project Management: The PDCA cycle is highly compatible with the Project Management Process Groups. For example, the Planning process group corresponds to " Plan, " Executing to " Do, " Monitoring and Controlling to " Check " and " Act. "

Continuous Improvement: By repeatedly cycling through these four steps, an organization or project team can ensure that processes are constantly being refined, efficiency is increasing, and quality is consistently improving.

Analysis of Other Options:

A. prevention over inspection: This is a quality management principle which states that quality should be planned, designed, and built-in—not inspected-in. While PDCA helps achieve this, it is not the name for the PDCA cycle itself.

B. statistical sampling: This is a tool and technique used in Quality Control to choose part of a population of interest for inspection.

C. management responsibility: This is a concept emphasizing that the success of quality management requires the participation of all members of the team but remains the ultimate responsibility of management to provide the resources needed for success.