The $2.3M Gap at 60% Design: Pre-Construction Sequencing Under a Board Deadline
You are the constructor's project manager for a 168,000 sf, $52 million CM-at-risk science building for a public university. The contract requires pre-construction services at risk with a GMP negotiated at 90% construction documents. The owner's Board-approved program budget is $49.5 million, inclusive of an 8% owner contingency. The schedule shows 20 months from notice to proceed, with switchgear energization required at month 14.
At 60% design your estimate returns $51.8 million. Three drivers account for most of the gap: structural steel is $1.6 million above the program allowance because the local mill book is full; the 480V switchgear package now carries a 58-week lead time; and the laboratory fume hood scope grew from 44 to 61 units. The program director will not reduce the lab count and has asked you to "value engineer the gap away" in four weeks, before the trustees meet. The mechanical basis of design has not yet been issued.
1. Describe how you would sequence and resource the pre-construction work over the next four weeks to produce a defensible budget reconciliation. What do you do first, what runs in parallel, and who owns each output?
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Sequence by what closes the most risk fastest, not by discipline.
Week 1 - freeze the estimate (owner: you, with the estimator). Reconcile the $51.8M against the 60% documents line by line. Separate market-driven cost (steel, switchgear) from design-driven scope (fume hood count, MEP systems) and publish one variance list with dollar values and confidence ranges. You cannot value engineer a number you cannot attribute.
Weeks 1–2, in parallel - schedule risk (scheduler). Run a time-scaled CPM with the 58-week switchgear lead against the 20-month completion. Determine the last acceptable release date and quantify the downstream days lost if it slips.
Weeks 2–4 - target-value design workshops (design lead owns the agenda; you own the cost model). Run three sessions by system: structure, envelope, laboratory MEP. Every option gets priced within 48 hours and carried as a discrete line - accepted, deferred, or rejected by the owner. No open-ended brainstorming.
Week 3 - trustee-facing cost reconciliation, with the owner's 8% contingency shown separately and explicitly excluded from gap closure.
Ownership summary: you own the cost reconciliation and the recommendation; the architect owns design changes; the owner owns scope decisions and any early-procurement authorization.
2. The owner asks whether to release the switchgear as an early procurement package before the GMP is signed. Analyze the schedule benefit, the contractual mechanism, and the risks, and state your recommendation.
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Mechanism. Either a pre-purchase assignment - the owner buys the gear and assigns it into the future GMP - or a separate procurement contract let with the owner's written authorization before the GMP is executed, with the cost credited transparently into the GMP.
Benefit. 58 weeks from release against a 20-month (roughly 87-week) schedule with energization required at month 14 (61 weeks). If the package is not released within roughly three weeks, energization slips and every downstream activity - TAB, commissioning, owner training, occupancy - moves with it. The cost of waiting materially exceeds the premium risk on the gear.
Risks to disclose in writing:
- The gear is bought before design is complete, so ratings, available fault current, and coordination may change.
- The owner holds the contract directly, so supplier default, warranty, and delay remedies flow to the owner, not to you.
- The GMP negotiation must show the credit clearly, or the owner will believe it paid twice.
- If the project is cancelled, the owner is left holding a 58-week lead item.
Recommendation: release it - but only after the electrical engineer signs the one-line and the owner countersigns the pre-purchase risk memo.
3. Draft the substance of what you tell the program director about the $2.3 million gap and the unissued mechanical basis of design - including what you will not commit to.
Read the worked answer
Tell them the arithmetic and the uncertainty as two separate messages.
What to say:
- The current estimate is $51.8M against a $49.5M program budget - a $2.3M gap. The 8% contingency sits inside the budget, not on top of it; spending it to close a design-driven gap leaves the project with no reserve at exactly the design stage where reserves matter most.
- Roughly $1.6M of the gap is market-driven steel and is not recoverable through design changes in four weeks. The honest options are scope reduction, added budget, or a later GMP carrying escalation.
- The fume hood count is the largest owner-controlled lever and the fastest one to price.
What not to commit to: do not present a point number that depends on the unissued mechanical basis of design. Say instead: "The mechanical package is 28–32% of remaining cost and cannot be priced until the BOD is issued. Our estimate will carry a stated range, and we will re-baseline within ten days of receiving it."
Credibility comes from dated versions and published assumptions, not from optimistic precision. Offer a decision date, not a promise.