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Intermediate · 2 min read

Out-of-sequence progress

Work reported in a different order than the logic says — a small flag that often reveals a plan no longer being followed.

Working definition

Out-of-sequence progress is work statused in an order the logic says should not have happened — a successor starting before its predecessor finished. In small amounts it is normal; field crews adapt. In volume it means the network no longer describes how the work is actually being built — and every forecast computed from that network inherits the gap.

Key takeaways

  • When out-of-sequence work exists, the scheduling software has to decide what the broken relationship still means, and the calculation setting chosen changes the forecast.
  • Count the out-of-sequence activities, read the largest ones, and ask the only question that matters: does the logic still describe the plan?
01

Retained logic versus progress override

When out-of-sequence work exists, the scheduling software has to decide what the broken relationship still means, and the calculation setting chosen changes the forecast. Retained logic keeps the violated relationship: remaining work still waits for its predecessor, which is conservative. Progress override discards it: remaining work is free to continue, which is optimistic. Two schedulers can status identical progress and print different finish dates purely on this setting — which is why reviews check it on every submission.

02

What the reviewer actually does

Count the out-of-sequence activities, read the largest ones, and ask the only question that matters: does the logic still describe the plan? If the field has genuinely re-sequenced, the network should be corrected to match — visibly, in a submitted revision — rather than left to accumulate violations until the schedule is a fiction with actual dates in it. A rising out-of-sequence count across updates is one of the clearest early signals that schedule control is slipping.

Sources and scope

Follow the reference trail.

This guide is original educational commentary. Kairos reference records identify the source organizations, editions and scope behind this guidance. The original publishers retain their publications and rights.

10S-90: Cost Engineering TerminologyAACE International · checked 2026-08-01Checking schedulesOracle · checked 2026-08-01UFGS 01 32 01.00 10: Project ScheduleWhole Building Design Guide / U.S. Department of Defense · checked 2026-08-01