In a design-build project, changes in materials or scope adjustments should be managed collaboratively through a formal process that’s been established up front. The goal is to efficiently handle changes in scope, materials, or functionality without disrupting the overall project flow. The design-build firm assesses how any modifications could impact the project costs, timeline, or overall design, then shares a change proposal with the client. It’s your responsibility as the client to approve or work through any adjustments to that proposal, before aligning with the firm to implement those changes.