Case Audit File #10

The RFI Answer Did Not Match the Drawing

Audit of RFI 42 closure failure where the updated architectural plan designated Wall Type C despite the signed RFI response binding the design to Wall Type D.

Audit Date: August 14, 2026
Discipline Scope: Coordination Audit
Standard: MasterFormat 2026
The RFI Answer Did Not Match the Drawing
Drawing Verification Overlay
Original Comment

See RFI 42 for wall type change.

Underlying Concern

Wall type needs to match RFI exactly.

Author Response

Updated per RFI 42.

Changed Drawing Condition

Wall type changed to Type C, but RFI 42 said Type D.

RFI Consistency Audit & Downstream Impact

Audit Ref: RF-238

Provided Proof of Resolution

Drawing explicitly shows Type C.

Lead Reviewer Final Decision

Rejected, mismatch with RFI.

Downstream Engineering Consequence

Drawing reissued.

Resolution Protocol Analysis

In construction coordination, a formal Request for Information response becomes an authoritative contractual document once approved by the project architect and engineer of record. When drafting teams execute the subsequent sheet modifications, verbatim consistency between the written directive and the CAD or BIM model is essential.

A comment marked closed without an accompanying revision cloud, updated coordinate schedule, or verifiable sheet cross-reference constitutes an open quality risk.

In this incident, internal drafting miscommunication substituted Partition Type C (a standard one-hour drywall assembly) for the intended Type D (a double-stud acoustic acoustic rated enclosure). The prompt quality control audit caught the discrepancy prior to drywall framing procurement, avoiding tens of thousands of dollars in acoustic remediation teardown.

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