Part 1 of a 4 Part Series on Incorporating Weather Days into Your Project’s CPM Schedule
By Mark Nagata & Bill Haydt
This article was first published on Trauner Ideas & Insights and is republished here with permission. Copyright © 2018 Trauner Consulting Services, Inc. All rights reserved.
An often-debated question is “How should a project schedule incorporate the workdays that might be lost to adverse weather?”
While there is not one perfect solution for all projects, there are at least three approaches to incorporating weather into your CPM schedule. These approaches are:
- Incorporating non-workdays into the schedule’s work calendars to represent the workdays that might be lost to adverse weather.
- Increasing the durations of weather-sensitive work activities to represent the workdays that might be lost to adverse weather.
- Adding an “adverse weather” activity at the end of project with a duration that equals the number of workdays that might be lost to adverse weather.
(Of course, there is always a fourth option, which is to assume that every day lost to weather will be made up by working on Saturdays or by working overtime. If this is the assumption upon which both your costs and your schedule are based, and both your contract and your other team members are on board, then you may not have to bake any weather into your schedule at all.)
Each of these three options (except the one in which you do nothing to the schedule) will be discussed in more detail below.
Bill Haydt and Mark Nagata are Director, Shareholders of TRAUNER. Their expertise lies in the areas of construction claims preparation and evaluation, development and review of critical path method (CPM) schedules, delay analysis, training, and dispute resolution. They direct and perform all types of analyses from schedule delay analyses to inefficiency analyses and the calculation of damages.
Bill can be reached at bill.haydt@traunerconsulting.com
Mark can be reached at mark.nagata@traunerconsulting.com
More in the next blog post, Part 2 of a 4 Part Series on Incorporating Weather Days into Your Project’s CPM Schedule…
(Source: Nagata, Mark, and Bill Haydt. “Incorporating Weather Days into Your Project’s CPM Schedule.” Trauner Consulting Services, Inc., www.traunerconsulting.com/incorporating-weather-days-into-your-projects-cpm-schedule/)
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