Quantity Reconciliation: Best Practices for Alternative Delivery Success 

In alternative delivery methods like CMGC, PD-B, and CMAR, early and accurate alignment on bid items and  quantities is essential for ensuring accuracy and alignment in the estimate. Reconciling quantities can also help build trust, control costs, and minimize disputes. Unlike traditional design-bid-build, these collaborative approaches overlap design and construction phases, introducing multiple quantity sources: designer estimates, contractor proposals, independent verification, and final agreed figures for the GMP or lump sum. 

At ICE Teams, we’ve seen firsthand how disciplined quantity reconciliation prevents 5-15% cost growth from unresolved variances. Our go-to tool, the Quantity Reconciliation Form (https://iceteams.com/toolbox), provides a clear, side-by-side comparison that drives transparency and accountability. 

Why Quantity Comparison Matters Early 

 Alternative delivery thrives on collaboration, so we recommend project teams reconcile quantity differences early to ensure that all estimators are operating with the same foundation. Quantity differences can stem from differences of understanding in the following areas: 

• Interpretation of plans (e.g., average vs. site-specific cross-sections) 

• Field adjustments (swell/shrink factors, waste allowances) 

• Unit conversions or density assumptions (CY to TON for aggregates/asphalt) 

• Design maturity at the time of proposal 

• Means and methods to construct the project (shoring design and dimension differences, etc.) 

Without reconciliation, these variances can erode contingency, trigger change orders, or delay GMP negotiations. Our experience across U.S. projects shows that addressing them during open-book estimating builds owner confidence and unlocks innovation. 

Key Elements of the Quantity Reconciliation Form 

The Quantity Reconciliation form we use and recommend includes: 

• Columns for each source: Designer Quantities, Contractor Quantities, ICE Quantities, and final Agreed Quantities. 

• Notes fields: Critical for documenting reasons behind differences (e.g., “Contractor applied 15% swell based on geotech report”). 

• Actions tracking: “Who, What, When” assigns responsibility for resolution, ensuring follow-through in meetings. 

Best Practices We Apply on Every Project 

1. Start Early and Iterate: Populate the form during conceptual/preliminary design, then update through 30, 60, and 90% milestones. This iterative approach helps identify and track quantity changes as the project progresses and catches issues before they become expensive. 

1. Leverage ICE for Objectivity: Our independent quantity checks reduce bias and provide a reliable, justifiable benchmark. We aim to keep agreed-upon variances under 5-10% before moving to cost reconciliation. 

1. Document Assumptions Rigorously: Use Notes to explain every difference. Transparency here prevents future claims and supports audits. 

1. Assign and Track Actions: Every unresolved item gets an owner, action, and deadline. Review progress in regular reconciliation sessions to maintain momentum. 

1. Focus on Risk and Value: Prioritize elements that drive the budget like earthwork, pavement materials, and structural concrete. Where possible, capture value engineering opportunities during reconciliation. 

The Payoff 

Effective quantity reconciliation fosters collaboration, reduces change-order risk, reduces job costs, strengthens GMP negotiations, increase estimate precision, and positions projects for on-time, on-budget delivery. On past projects, we have seen that teams that master this step consistently achieve better outcomes and stronger partnerships. 

The Quantity Reconciliation Form is a simple yet powerful tool in our alternative delivery toolbox. When used consistently, it turns potential friction into shared success. 

If you’d like guidance on applying it to your next project, reach out, we’re happy to help.