TheCMAA Standards of Practice (Chapter 4 – Time Management)specifies that project schedule specifications should clearly defineexpected normal weather delaysbased on reliable climatological data to avoid disputes. The SOP states:
“The CM should recommend use of established meteorological data sources, such as NOAA, to define the number of normal adverse weather days anticipated in the schedule specification.”
This ensures consistency, fairness, and transparency in contract administration. Allowing the contractor to determine weather allowances (Option B) or deferring all responsibility to external sources (Options C and D) introduces ambiguity and potential disputes.
References (CMAA Construction Manager Documents / Study Guide):
CMAA Construction Management Standards of Practice, 2010 Edition, Chapter 4 – Time Management, Section “Weather Considerations and Schedule Specifications.”
CMAA CM Study Guide, Time Management Domain, Objective 4.1: “Develop schedule specifications including allowances for normal weather impacts.”
