Commitment reliability (PPC) — the lean construction metric your programme actually needs
Percent Plan Complete (PPC) is the lean construction metric that predicts programme slippage weeks in advance — SiteLive computes it from your live bookings, per trade.
The metric that actually predicts slippage
Traditional construction reporting is a records exercise. Lean construction — Last Planner, VisiLean, and the school of thought behind them — uses one number to predict: Percent Plan Complete (PPC). If a trade commits to 10 activities this week and completes 6, their PPC is 60 percent.
Trades with a PPC below 70 percent are your leading indicator that the programme is about to slip.
How SiteLive computes it
- Every booking is a commitment.
- Confirmation = the trade said "we will be there".
- Completion (via TaskLive) = they did it.
- PPC is the ratio, computed per trade, per week — from real data, never a survey.
Where it shows up
- Commitment reliability page — every trade, ranked.
- Subbie Track Record — becomes part of the trade reputation across sites.
- Mission Control — feeds the risk radar and the forecast.
FAQ
Do I need Last Planner training? No. If you already run a lookahead, you already have the data.
What is a good PPC? World-class is 85 percent plus. Most sites run 55 to 70 percent. Getting from 60 to 75 is where the programme gets predictable.