What Is Engineering Quality Control (QA/QC)?

Quick Answer

What Is Engineering Quality Control?

Engineering quality control (QA/QC) is the internal review process engineering firms use to verify that drawings, calculations, and engineering documents are accurate, complete, internally consistent, and code-compliant before they are issued to clients or submitted for permit. QA/QC catches errors before they reach the building department — and before they're built into the structure.

What Engineering QA/QC Involves

Independent review of engineering calculations by a second engineer
Drawing check for consistency with calculations
Code compliance review against applicable building code edition
Checking engineering against architectural plans for coordination
Review of multi-discipline coordination — structural vs. MEP conflicts
Review of calculations for mathematical and methodology accuracy
Checking drawing completeness — all required details and notes present

Why QA/QC Matters

Engineering errors caught internally cost far less than errors caught at plan check
Errors built into construction can require costly remediation or demolition
QA/QC reduces plan check comments and resubmittal cycles
Professional liability claims often arise from failures in QA/QC
Building owners deserve engineering that was checked before it was submitted

QA/QC at Apex Grid

All permit packages receive internal drawing and calculation review
Multi-discipline coordination review before permit submittal
PE review of all stamped documents
We use structured checklists for each project type
Resubmittals include QA/QC review of all revised documents

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