Using weather calendar vs risk events for cost analysis

[ManDell]

When should I use weather calendars vs risk events?

[Intaver Support]

Weather calendars are specifically designed to model known ranges of weather-related non-working days during the execution of a project. The main effect of using weather calendars when also performing cost analysis of time dependent cost analysis using resource rates is that even though there is a weather related delay, no work is performed and therefore no costs are calculated.

Alternatively, if risk events are used to model weather related delays, this acts to expand the length of effected activities and increases the related time dependent costs. Therefore, we recommend that for time dependent costs, we recommend the use of risk events to model delays due to weather if resources will still be working during the weather related delays.