A mandatory waiting period built into the schedule between completing one task and starting the next.
Lag is a scheduled waiting period inserted between the finish (or start) of a predecessor activity and the start (or finish) of a successor activity in a CPM network. It is used to model real-world waiting times such as concrete cure time, approval review periods, or material lead times. Excessive use of lags in a CPM schedule instead of explicit activities is discouraged by scheduling specifications because it obscures actual project logic.
A 7-day lag was added after concrete pours to account for the minimum cure time required before stripping formwork.
Get AI-powered bid alerts, automated form filling, and proposal drafting.
Start Free Trial