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Critical path by Total Float is wrong in multiple calendar project

Tuesday, 21 June 2016
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In Primavera we can define Critial activities by 2 option:

There are many reasons why we should choose Longest Path instead of Total Float. One of the reason is that when our project has multiple calendar.

We have 4 activities which have same calendar : Standard 5 day workweek. We use Total Float to calculate Critical path. The result is this:

When I change A1020 activity’s calendar to 1 Day Workweek. We use Total Float to calculate Critical path. The result is this:

You can see it’s wrong critical path.

Now when you choose Longest path option. It will become like this:

Now the critical path is better:-)

So when you have multiple calendar project, consider to use Longest path option.

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