Process Cycle Efficiency (PCE) Calculator
See how much of your lead time is real value — Process Cycle Efficiency in one number. Free, instant and fully in your browser.
Process Cycle Efficiency
5%
Untouched process — large flow opportunity
PCE = Value-add time / Total lead time × 100
Find the waste, then remove it
You calculated this from estimates. Measure the real one from shop-floor video.
What is Process Cycle Efficiency?
Process Cycle Efficiency (PCE) is the share of total lead time that is genuinely adding value. It divides value-add time by total lead time. Most processes sit in single digits — the rest is waiting, queuing, moving and rework. PCE turns 'we have a lot of waste' into a number you can track and target.
How to calculate PCE
- 1
Measure value-add time
Add up only the steps that physically transform the product the way the customer pays for.
- 2
Measure total lead time
Take the full elapsed time from start to finish, including all waiting and queuing.
- 3
Read PCE
PCE = value-add / total lead × 100. The lower it is, the more flow opportunity you have.
Frequently asked questions
What is a good PCE?
It varies by process type, but many discrete processes run below 10%. Reaching 25–30% usually reflects strong lean practice, and single-piece-flow cells can go higher. Track your own trend rather than chasing an absolute number.
Why is PCE usually so low?
Because lead time is dominated by waiting, queuing, batching and transport — not by the value-add steps themselves. That is exactly why value stream mapping focuses on the gaps between steps.
How do I raise PCE?
Cut waiting and batch sizes, balance the line and remove waste between steps. Yamazo Studio measures the value-add vs non-value content from real video so you target the right losses.
What does a PCE of 10% indicate?
That roughly one tenth of the time an order spends in your process is actually adding value — the other 90% is waiting, queuing, moving or being reworked. It is not a sign of lazy operators: value-add steps are usually fast, and the lead time is consumed between them. For many discrete manufacturers 10% is close to normal, which is why the useful comparison is your own trend rather than the absolute figure.
What is the difference between PCE and OEE?
PCE looks at the whole flow — value-add time divided by total lead time, usually measured in days — and exposes waiting between processes. OEE looks at one asset over planned production time and exposes equipment loss. A line can have excellent OEE and terrible PCE: the machines run well and the product still sits in queues for a week.