AiVibeIndustry 4.0 & Manufacturing Operations
PDCA Cycle (Plan-Do-Check-Act)
The PDCA cycle is an iterative four-step method for continuous improvement and problem-solving: plan a change, do it on a small scale, check the results against expectations, and act by adopting, adjusting or abandoning the change.
In the plan step, the problem or opportunity is defined, the current situation and causes are analysed, and a change with an expected outcome is designed. Do means implementing the change, ideally as a small trial. Check compares the results with the prediction. Act standardises the change if it worked, or starts another cycle with a revised plan if it did not. Repeating the cycle produces incremental learning and improvement.
The cycle derives from Walter Shewhart's application of the scientific method to quality control, and W. Edwards Deming taught it widely, later preferring the name PDSA, plan-do-study-act, to emphasise learning. PDCA underpins kaizen and A3 problem-solving, and ISO 9001 and other ISO management system standards explicitly describe their structure in terms of the PDCA approach.
PDCA is simple to describe but is often shortened in practice to plan-do, without checking results or standardising what worked. Effective use requires measurable expectations in the plan step and data to evaluate them. For complex problems, structured methods such as DMAIC or 8D provide more detailed steps while following the same underlying logic of hypothesis, experiment and learning.
Key points
- Four steps: plan, do, check and act.
- Derived from Walter Shewhart's work and popularised by W. Edwards Deming.
- Deming later preferred PDSA, with study replacing check.
- ISO 9001 and other ISO management system standards use the PDCA approach.
Where AiVibe comes in
AiVibe designs and manufactures the AiAmbA AI Factory as the OEM: edge devices plus AI agents that let people talk to PLC, CNC and robot controllers in plain language. Existing lines are retrofitted with edge devices, and a trained operator confirms every change an agent proposes.
Explore AiVibe’s work in Industry 4.0 & Manufacturing Operations →
Related terms
- KaizenIndustry 4.0 & Manufacturing Operations
- DMAIC (Define, Measure, Analyse, Improve, Control)Industry 4.0 & Manufacturing Operations
- 8D Problem Solving (Eight Disciplines)Industry 4.0 & Manufacturing Operations
- Quality Management System (QMS)Industry 4.0 & Manufacturing Operations
- Standard WorkIndustry 4.0 & Manufacturing Operations