By the time a delay shows up clearly on a project schedule, it usually started weeks earlier — in a small decision or dependency that nobody flagged at the time.
In engineering project management, the most damaging delays are rarely dramatic single failures. They're small, quiet slippages — a supplier confirmation that took three extra days, an approval that sat in someone's inbox — that compound silently until the cumulative effect finally becomes visible on the master schedule.
Why status meetings often miss this
Weekly status updates tend to capture whether a task is "on track" in binary terms, without capturing how much margin has already been consumed. A task can report "on track" three weeks in a row while quietly eating through its entire schedule buffer, until the buffer runs out and the delay suddenly appears.
Tracking margin, not just status
A more useful practice than binary status tracking is monitoring how much schedule buffer each critical task has consumed relative to its plan — not just whether it's technically still within its own deadline. This surfaces quiet erosion long before it becomes an unavoidable, visible delay.
A practical starting point
On your current project's critical path, identify the task with the least remaining schedule buffer relative to its original plan — not the task that looks most "behind" today. That's usually where the next visible delay will originate.