What is a hold point on a nuclear job?

A stop in the work where a designated representative must witness or inspect before the job continues. The hold point is listed in the inspection and test plan, and work does not pass it until that consent is recorded.

Why is witness coordination a separate allowance?

Because the delay rarely comes from the inspection itself. It comes from getting a witness to the work, aligning schedules, and re-presenting work that was not ready when the witness arrived.

What does a negative hours over the window mean?

Required delay is below the window you entered, so the work fits with room to spare. The figure is signed, and zero means the delay exactly fills the window.

Can this page show the critical path impact?

No. It sizes the total delay hours a set of hold points consumes. Whether those hours land on the critical path depends on your schedule logic and how the hold points sequence.

Nuclear & Critical Infrastructure Manufacturing calculator

Quality Hold Point Delay Calculator

Estimate the schedule delay from clearing hold points on a job. Base hours come from the hold point count and clearance rate, inflated for witness coordination and re-presentation.

What this calculator does

Schedule hours quality hold points consume, including witness coordination and re-presentation, and whether the delay fits the available window.

Formula used

Base hold point delay = hold points to clear ÷ hold points cleared per hour
Witness coordination hours = base hold point delay × witness allowance ÷ 100
Required hold point delay = base hold point delay + witness coordination hours
Hours over the window = required hold point delay − available delay hours (signed)
Window use = required hold point delay ÷ available delay hours × 100, blank at a zero window

Inputs explained

Hold Points to Clear: Hold points on this job that still need witness sign-off.
Hold Points Cleared per Hour: Clearance rate from recent build records, including sign-off.
Witness Coordination and Re-Presentation Allowance: Extra delay for reaching witnesses and re-presenting work.
Available Delay Hours: Delay hours the schedule can absorb before the milestone.

How to use the result

Best suited to sequencing hold points on a weld plan, planning witness availability for a build, checking delay before a milestone release.
Wait time from rework found at a hold point belongs to rework, not to this delay. Excludes travel between sites when one witness covers multiple jobs.

Common questions

What is a hold point on a nuclear job? A stop in the work where a designated representative must witness or inspect before the job continues. The hold point is listed in the inspection and test plan, and work does not pass it until that consent is recorded.
Why is witness coordination a separate allowance? Because the delay rarely comes from the inspection itself. It comes from getting a witness to the work, aligning schedules, and re-presenting work that was not ready when the witness arrived.
What does a negative hours over the window mean? Required delay is below the window you entered, so the work fits with room to spare. The figure is signed, and zero means the delay exactly fills the window.
Can this page show the critical path impact? No. It sizes the total delay hours a set of hold points consumes. Whether those hours land on the critical path depends on your schedule logic and how the hold points sequence.

Last reviewed 2026-10-01.