Which practice can the CM recommend to avoid disputes regarding weather delays when developing schedule specifications?

Which practice can the CM recommend to avoid disputes regarding weather delays when developing schedule specifications?

• A. Ignore historical weather data
• B. Rely on contractor's forecast only
• C. Define weather allowances based on market practice
• D. Use a recognized reference such as NOAA and define the number of allowable weather impact days

Answer: (D)

Weather delays are a common source of dispute in schedules, so the best approach is to set objective, clearly defined allowances tied to an authoritative data source. Using a recognized reference such as NOAA provides reliable, region-specific historical weather data that both parties can consult and trust. By defining the number of allowable weather impact days, you establish a transparent threshold for what counts as weather-related disruption and when a schedule extension is warranted. This creates a consistent baseline, reduces subjective judgments, and helps ensure fair adjustments to the schedule. In contrast, ignoring historical data or relying only on the contractor’s forecast introduces bias and variability, while basing allowances on market practice can be inconsistent across projects.

Weather delays are a common source of dispute in schedules, so the best approach is to set objective, clearly defined allowances tied to an authoritative data source. Using a recognized reference such as NOAA provides reliable, region-specific historical weather data that both parties can consult and trust. By defining the number of allowable weather impact days, you establish a transparent threshold for what counts as weather-related disruption and when a schedule extension is warranted. This creates a consistent baseline, reduces subjective judgments, and helps ensure fair adjustments to the schedule. In contrast, ignoring historical data or relying only on the contractor’s forecast introduces bias and variability, while basing allowances on market practice can be inconsistent across projects.