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Change Order Velocity Calculator
High change order velocity signals scope creep and budget risk. This calculator tracks $/week and % of budget as early warning.
CO as % of budget
2.25%
Weekly CO rate
$15,000
Monthly CO rate
$64,950
Projected year-end CO
$780,000
How the math works
CO velocity = total CO ÷ weeks × projected remaining weeks. Extrapolate to see full-project exposure.
Projects with CO velocity >$/week equivalent to 1%/month budget are runaway — intervene immediately. Freeze non-essential changes; require owner-PM approval.
How to Use
- Enter total change orders to date.
- Enter weeks elapsed.
- Enter total project budget.
- Read CO velocity and % of budget.
Frequently Asked Questions
What's healthy velocity?
Under 0.5% of budget per month on well-scoped projects. 1-2%/mo = concerning scope creep. >2%/mo = project out of control; escalate to PM.
What drives velocity?
Incomplete design, aggressive scope, owner changes, field conditions (site surprises), subcontractor disputes. Address root cause, not just the line item.
How to control?
Strict CO approval process, design completion before GMP signing, site investigation upfront, weekly review meetings. Institutional owners budget 5-10% contingency for CO.
Who owns this risk — sponsor or lender?
Construction risks are typically shared: hard-cost overrun owned by sponsor (via completion guaranty), soft-cost and delay risks shared per contract, force-majeure excused but bears owner carry cost. Document risk ownership in the loan agreement and GC contract before closing. Disputes get expensive when roles are unclear. Institutional deals spell out every allocation in writing.
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