Icologiq Knowledge · Method

Plan-Do-Check-Act Cycle

An iterative four-step improvement cycle—Plan, Do, Check and Act—used to control processes, evaluate results and drive continual improvement.

PDCA

Also known as:

PDCA cycle, Plan Do Check Act, Plan-Do-Check-Act, Plan Do Check Act cycle

At a glance

Type

Method

Topic

Improvement

Applies to

Cross-industry

Current version

Status

Last reviewed

September 29, 2026

Definition

The Plan-Do-Check-Act (PDCA) cycle is an iterative management and improvement method built around four connected steps: Plan what needs to be achieved and how; Do what was planned; Check performance and evidence against the intended result; and Act on what was learned by correcting, standardizing or improving the process before the next cycle begins. In management systems, PDCA can be applied to individual processes as well as to the system as a whole.

Why it matters

For Quality and QHSE teams, PDCA provides the operating logic that connects planning, controlled execution, monitoring, audits, incidents, CAPA, change and continual improvement. It helps prevent quality management from becoming a set of disconnected records by creating a repeatable loop from requirement or risk, through action and evidence, to evaluation and improvement.

View term

An ongoing approach to improving processes, performance and outcomes through structured evaluation, actions, learning and measurable improvement initiatives.

Continuous Improvement

Process

· Improvement

View term

A structured process for addressing causes of actual or potential problems through corrective or preventive measures and verifying that actions are effective.

CAPA

Process

· CAPA & Incidents

View term

The structured process for reporting, assessing, investigating, following up and learning from incidents and related events.

Incident Management

Process

· Incident Management

View term

The coordinated planning, execution, reporting and follow-up of audits within a structured and traceable process.

Audit Management

Process

· Audit

View term

A structured system of processes, responsibilities, controls and documented information used to manage quality and continually improve organizational performance.

Quality Management System

Concept

· QMS

View term

The international standard specifying requirements for a quality management system focused on consistent performance, customer requirements and continual improvement.