What happens at each step?
Plan: define the problem and goal, analyze causes, and set an action plan and metrics. Do: run the plan on a small scale and record data. Check: compare results with the goal—what worked, what didn't. Act: standardize what worked, or fix what didn't and start the next Plan. The key is to keep cycling, not to stop after one loop.
How do you apply it?
Studying for an exam: plan 50 vocabulary words a day (P), do it for two weeks (D), check your accuracy on a practice test (C), then adjust your review to target weak spots (A). Deming preferred Study over Check to stress learning, calling it PDSA. In fast-moving settings it's often paired with OODA loops or the lean startup build–measure–learn loop.
FAQ
- Why does PDCA often fail?
- Teams skip Check and Act and just keep planning and doing.
- Can PDCA work with OKRs?
- Yes—set goals with OKRs and use PDCA to execute and improve.
Sources reviewed: 2026-10-25
References
- Deming, W. E. (1986). Out of the Crisis. MIT Press.
- Moen, R., & Norman, C. (2009). Evolution of the PDCA cycle. Proceedings of the 7th ANQ Congress, Tokyo.