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Continuous process improvement is the recurring, evidence-guided work of making a process perform better. A team identifies an opportunity, plans and tests a change, checks the results, and uses what it learns to decide whether to adopt that change or try another. The changes may be incremental or breakthrough; improvement is not a one-time fix.
What continuous process improvement means
The American Society for Quality (ASQ) defines continuous improvement as “the ongoing improvement of products, services or processes through incremental and breakthrough improvements.” Applied specifically to processes, that means repeatedly examining how work is done and using evidence to make it more effective. The term describes an ongoing effort, not a guarantee that every change will succeed.
“Continuous process improvement” is a way to describe improvement focused on processes; it is not a separate method in the sources cited here. Teams can use different methods to organize the work, depending on the problem and setting.
How the PDCA cycle turns improvement into repeated work
Plan-Do-Check-Act (PDCA) is one practical way to structure improvement. ASQ presents it as a repeatable cycle used, among other purposes, to work toward continuous improvement. Its stages are:
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- Plan: Recognize an opportunity and plan a change.
- Do: Test the change on a small scale.
- Check: Review the test, analyze the results, and identify what was learned.
- Act: Adopt a successful change more widely, or use the learning to plan another cycle.
The check matters: compare what happened with what the team expected before deciding what to do next. If results do not support the change, the team can revise its plan rather than treating the first attempt as a permanent solution. ASQ’s PDCA overview describes the cycle and its stages.
How improvement approaches relate
PDCA is a cycle for organizing repeated learning; it is not the definition of continuous process improvement. Other approaches address improvement in different ways. ASQ describes Lean, Six Sigma, and total quality management as widely used methods that emphasize employee involvement and teamwork, measuring and systematizing processes, and reducing variation, defects, and cycle times. Its Certified Quality Process Analyst handbook sample also covers DMAIC: define, measure, analyze, improve, control.
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| Approach | What the cited sources establish | How to interpret it |
|---|---|---|
| PDCA | A repeatable Plan-Do-Check-Act cycle used to organize improvement work. ASQ | A cycle for testing, evaluating, and acting on changes. |
| Lean, Six Sigma, and total quality management | ASQ identifies these as widely used improvement methods and describes shared emphases on employee involvement and teamwork, process measurement and systematization, and reducing variation, defects, and cycle times. ASQ | Related approaches, not synonyms for the definition. The cited overview does not assign each listed emphasis to a specific method. |
| DMAIC | The ASQ Certified Quality Process Analyst handbook sample covers define, measure, analyze, improve, and control. ASQ handbook sample | A named improvement sequence; the cited sample does not establish a universal rule for when to choose it. |
There is no universal selection rule established by these sources. A practical comparison considers the problem, the scale and pace of change, how data and analysis will be used, who needs to participate, and how the revised process will be sustained.
Continuous improvement and continual improvement
ASQ says “continuous improvement” and “continual improvement” are often used interchangeably. It also notes a distinction made by some quality practitioners: “continual improvement” may serve as a broader umbrella that includes discontinuous improvements, while “continuous improvement” may refer more narrowly to linear, incremental change within an existing process. That distinction is a practitioner usage, not a universally enforced definition. ASQ’s glossary and overview discuss both terms.
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Where it fits in quality management
Continuous process improvement can be part of a broader quality management system. ISO’s page for ISO 9001:2026 identifies it as Edition 6 and describes the standard as covering the establishment, maintenance, and continuous improvement of a quality management system. The page also refers to monitoring and evaluating performance and using evaluation and other data sources as a basis for improvement. Organizations may choose whether to pursue certification. These details reflect the ISO page as accessed on October 5, 2026; check the page for the current edition if the standard’s status is material to a decision. ISO 9001 overview
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