Methodology and Sources

Coordination savings (9% baseline): Dodge Construction Network and Dusty Robotics surveyed contractors and trade professionals and found that poor coordination costs an average of 9% of total project budget in rework, conflict resolution, and change orders. This evaluator scales that baseline by your project’s suitability score (higher complexity = more coordination value) and applies a 40–80% capture range based on BIM maturity — reflecting that even well-implemented BIM does not catch every conflict, but catches the majority.

BIM implementation cost (1–3% of design budget): Industry composite from Dodge SmartMarket Reports, BIM Forum guidance, and practitioner case studies. Design budget is estimated at 10% of construction budget. The range reflects project complexity — healthcare and lab projects at the high end, commercial at the low end. Costs include additional modeling effort, coordination time, software, and technology infrastructure.

Rework baseline (40% of project cost): Dodge Construction Network, citing Erin Roberts of EY, reports that approximately 40% of total construction project cost is attributable to rework. Not all rework is preventable by BIM — owner-directed changes, unforeseen site conditions, and material substitutions are independent of coordination quality. This evaluator uses BIM-preventable rework as a subset, estimated at 30–50% of total rework for high-coordination projects.

Prefab schedule savings (30–50% schedule reduction): McKinsey Global Institute, “The Next Normal in Construction.” Carrying cost savings estimated using the project budget, a 6–8% annual cost of capital, and the schedule compression range. Actual savings depend on the proportion of scope that is prefabricated and the project’s financing structure.

MacLeamy Curve: Adapted from Patrick MacLeamy (HOK). The curve shape is adjusted by project type — healthcare and laboratory projects have steeper cost-of-change curves due to regulatory resubmission, contamination control, and specialized system interdependencies. Simple commercial projects have flatter curves. The percentages shown are directional estimates informed by published case studies, not precise measurements for any individual project.

Diminishing returns by phase: Directional estimates based on the principle that BIM’s value is proportional to how early in the project it influences decisions. Pre-design adoption captures nearly all potential value; post-construction adoption captures only facility management benefits. Percentages are informed by industry consensus and published case comparisons, not by a single controlled study.

ROI calculation: Net savings (coordination savings minus BIM implementation cost) divided by BIM implementation cost. Does not include schedule savings from prefabrication, which are shown separately. The ROI range reflects the range of both savings and costs — the low estimate uses conservative savings with high implementation cost; the high estimate uses optimistic savings with low implementation cost.

Important: All figures are directional estimates based on published industry research. They are not guarantees and should not be used as the sole basis for investment decisions. Actual BIM costs and savings depend on project-specific conditions, team capability, contract structure, and implementation quality. This tool is provided as an educational resource to support informed decision-making. We recommend discussing results with a qualified BIM consultant or contractor experienced in digital coordination.