What is an ASI (Architect's Supplemental Instruction)?
Understanding ASIs, when they're used, and how they differ from RFIs and change orders
ASI Definition
An Architect's Supplemental Instruction (ASI) is a written document issued by the architect to clarify, interpret, or order minor changes to the construction documents. ASIs are intended for changes that do not affect the contract sum or contract time. Unlike a change order, an ASI should have no cost or schedule impact.
ASIs are for changes that do NOT affect cost or schedule. If there's any cost or time impact, it should be processed as a change order, not an ASI.
When is an ASI Used?
When drawings or specs are unclear and need interpretation without adding scope.
Small changes to details, finishes, or equipment that don't change the overall scope.
Approving an equal substitution that doesn't change cost (though usually a separate process).
Fixing minor errors or inconsistencies in the documents that were always intended.
ASI vs. RFI vs. Change Order
| Document | Initiated By | Purpose | Cost Impact? |
|---|---|---|---|
| RFI | Contractor | Ask a question | May lead to change |
| ASI | Architect | Clarify or modify (minor) | No cost/time impact |
| CCD | Owner/Architect | Direct change (price TBD) | Yes, pending negotiation |
| CO | All parties sign | Formal contract change | Yes, agreed amount |
What's Included in an ASI?
ASI Best Practices
- • Be specific about what's changing and why
- • Include sketches for visual clarity
- • Reference affected drawing sheets and spec sections
- • Verify no cost/time impact before issuing
- • Review ASIs promptly upon receipt
- • If there IS a cost/time impact, respond in writing immediately
- • Log all ASIs and incorporate into project documents
- • Distribute to affected subcontractors
Common ASI Pitfalls
Some architects use ASIs to add scope without going through change order process. Contractors should flag any ASI that adds work.
ASIs issued after work is complete may require rework. There may be valid claims for cost recovery.
ASIs should be as clear as the original documents. Vague ASIs lead to more RFIs.
Related Resources
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