Delegated Design vs Design Assist: Responsibility Guide

What changes between delegated design, design-assist and design-build?

The useful distinction is the task being purchased. AIA’s Blurred boundaries guidance describes design-assist as advisory and delegated design as responsibility for a system’s detailed engineering. The project designer still has work to do in either arrangement, including defining appropriate criteria for delegated work.

DBIA identifies the combined owner contract as the defining feature of design-build. A package inside that arrangement can still involve design-assist or delegated design. Start with the design-build topic collection if you need the wider delivery context.

Design-assist does not mean nobody is accountable for the advice. The AIA/AISC collaboration paper explains that the contributor may have contractual responsibility for information while the project design professional retains responsibility for incorporating it into the design. Read the promised service and reliance provisions before assigning a role from its label. AIA/AISC, Part I, printed pp.6–8.

Fill in a responsibility matrix for each package

Use one copy per defined system or component. Enter a person’s or firm’s name alongside the clause, specification section or agreed record that establishes the duty. A blank means unresolved, not “no responsibility.” This is an editorial review worksheet; it does not allocate contractual or professional duties by itself.

Start the record with the package name, drawing/specification revision and the agreements you are comparing. Keep the project entry blank until you can point to a document. Where documents disagree, record both references and put the conflict to the project team and its advisers.

Add a due date and current status to your working copy. If one organization occupies several rows, preserve the separate duties and references. A name repeated across the table does not explain what that organization has agreed to deliver.

For the agreements behind those entries, use the design-build contract package guide. Its party and document crosswalk answers a different question from this package-level worksheet.

Test the boundary with a hypothetical window package

Separate the recommendation, the design deliverable and the interface decision. Consider a proposed window package: a specialist suggests a different assembly during a design meeting. Record that suggestion as advice, identify who decides whether to adopt it, and then locate any agreement assigning the assembly’s engineering. The suggestion alone is insufficient evidence to fill the engineering row.

An aluminum corner sample sits beside gray material samples and blank sheets.

The following is a hypothetical exercise, not a completed project or a technical design. It contains no loads, dimensions or product specifications.

Ask the team to describe the boundary in ordinary words before accepting a scope such as “complete window system.” Include adjacent work in the question: a package description may leave a support, opening or interface needing a separate entry. This is a prompt to investigate the actual documents, not a rule assigning those elements to any particular party.

What does a submittal review establish?

Write down the review’s stated purpose. The AIA/AISC paper’s discussion of A201–2017 §3.12.10.1 describes specified design criteria, services furnished through an appropriately licensed professional with signature and seal, and the architect’s stated limited review for conformance with the supplied information and design concept. This is a publisher’s contract example, not a provision automatically governing every project. Read the discussion at printed pp.11–13.

For your record, distinguish the designer’s professional authentication, the contractor’s submission, the project designer’s review and any authority’s action. Request a separate reference for each. An unexplained “approved” entry leaves the reader unable to tell which action occurred.

Local requirements need their own check. For example, New York’s Design Delegation practice guidance addresses written parameters, the delegatee’s license and certification, and the delegator’s written conformance and integration determination. It expressly distinguishes guidance from governing law and rules. Use it as a New York example; consult the licensing board and building authority for the project’s actual location.

Close the handoff with a written record

Before closing the responsibility discussion, ask the team to locate the evidence for every filled row. Keep an unresolved question open with a named person responsible for obtaining the answer. Bring contract interpretation and insurance questions to project counsel and the relevant insurance adviser.

An open ring binder with colored tabs lies beside a closed folder and rolled paper.

Use these questions to check the completed record:

• Can a reader identify the assigned design portion without relying on a meeting recollection?
• Does the criteria reference identify a current document, rather than a general promise to “coordinate”?
• Is a specialist’s recommendation recorded separately from the decision to incorporate it?
• Are the responsible professional and locally required signature, seal or certification arrangements confirmed?
• Does each submittal and review entry state who acts, what they review and how comments return?
• If a different specialist takes over, which recommendations, assumptions and open questions must be handed over?

Save the worksheet with the referenced revisions and review record. It is an aid to finding missing decisions; the signed agreements and applicable requirements remain the basis for the team’s responsibilities.

Method and sources

This guide is an independent editorial synthesis of public guidance, checked October 15, 2026. The worksheet, handoff questions and hypothetical window exercise are original organizational aids. They are not legal advice, contract clauses, engineering instructions or evidence of a completed project.

• AIA, Mark Walsh: Blurred boundaries: Design assist and delegated design, especially printed pp.1–3 and 6–7, for the advisory/design distinction and retained criteria responsibilities.
• AIA/AISC: Design Collaboration on Construction Projects, Part I, 2020, printed pp.6–8 and 11–13. The A201 discussion is read from this public paper; no missing provision is inferred from a partial contract sample.
• DBIA: What Is Design-Build?, for the owner-level delivery definition.
• New York State Education Department: Guideline 4: Design Delegation, items 2–5, as a jurisdiction-specific example. Permitted delegation, professional practice and authentication requirements must be checked locally.