A ceiling caps exposure without creating an incentive to stay under it — and only one of the three reasons programs breach it is fixed by raising the number
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Every time-and-materials contract carries a ceiling price. It is the government's protection against the structural weakness FAR names explicitly: a T&M contract provides no positive profit incentive to the contractor for cost control or labor efficiency.
The ceiling caps how much can be spent. It does nothing about the reason spending grows, which is why programs reach it and then negotiate an increase rather than finishing under it.
The useful analysis is not whether a ceiling was set correctly. It is which of three distinct failures put the program against it, because they demand different responses and only one is solved by a larger number.
In our reading of how AI programs actually breach: the estimate was built on a scope that did not yet exist; the undifferentiated platform work consumed the budget before differentiated work started; or the definition of done was never testable, so nothing could be accepted and closed. Raising the ceiling addresses the first. It makes the second and third worse.
Burn rate matters more than absolute spend. A program at 60% of ceiling with 30% of scope delivered is already in trouble.
If the only progress signal is hours burned, you cannot distinguish work from motion.
If the ceiling was set to available budget rather than to an estimate of the work, the breach was scheduled at award.
For AI, an evaluation set with a passing threshold drawn from your own data. Without one, acceptance is a negotiation.
These look identical on a burn chart and require completely different responses. Diagnosing correctly is the only step that matters, because the wrong remedy accelerates the problem.
The requirement changed or was discovered. A ceiling increase is the legitimate remedy here.
Retrieval, evaluation, guardrails, access control, audit — built from scratch on your funding. More ceiling buys more of the same.
Nothing can be accepted, so nothing closes. More ceiling extends an engagement that cannot end.
Categorise delivered effort into platform infrastructure versus work specific to your organization. This single ratio explains most AI ceiling breaches and is almost never computed.
A ceiling increase re-runs the same structure with a larger number. That is correct only where the scope genuinely changed. Where the platform is being constructed, the alternative is to stop constructing it.
Whatever the remedy, the conditions that produced the breach persist unless they are changed deliberately.
FAR pairs the ceiling requirement with a surveillance requirement precisely because the ceiling alone does not create a reason to finish early. Treating the ceiling as sufficient control is the most common misreading of the subpart.
Categorising delivered effort into platform infrastructure versus organization-specific work usually explains the breach in one number, and it is straightforward to compute from timesheets already being submitted.
When the ceiling is derived from what was available rather than from an independent estimate of the work, the breach was determined at award and no amount of management prevents it.
AI acceptance criteria that describe features rather than measured performance on a held-out evaluation set turn acceptance into a negotiation, which no ceiling can end.
Work already delivered that is specific to your organization generally survives as an extension on a licensed platform. The undifferentiated portion is what stops being rebuilt.
Categorise submitted timesheets into platform infrastructure versus organization-specific work
Track cumulative invoiced value against evaluation-set pass rate monthly
Count phases closed with signed acceptance against phases funded
Date of first documented ceiling discussion against cumulative burn
Consequence: A larger ceiling funds more of whatever caused the breach, most often platform construction.
Prevention: Compute the undifferentiated effort ratio before accepting a scope-change diagnosis.
Consequence: The ceiling stops being an estimate and becomes a spending target that will be reached.
Prevention: Derive the ceiling from an independent estimate of the effort required.
Consequence: Motion is indistinguishable from progress until the ceiling arrives.
Prevention: Report against a held-out evaluation set with a passing threshold.
Consequence: An engagement that could not close before still cannot close, at a higher number.
Prevention: Make a testable definition of done a condition of any additional obligation.
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