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Free Float greater than Total Float

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Emma Lang
User offline. Last seen 4 weeks 3 days ago. Offline
Joined: 9 Aug 2016
Posts: 43
Groups: None

Hi, 

 

I'm having an issue with Free Float v Total Float, in some instances I have Free Float which is greater than Total Float. I understand the difference between the two so I don't understand how free float can be greater than total float. I read somewhere that it could be a poor use of constraints and I have constraints in these activities / milestones to try to hold the completion dates, either Finish On or Finish On or Before. 

 

Any advice would be appreciated. 

Emma

Replies

Alexandre Faulx-B...
User offline. Last seen 14 hours 26 min ago. Offline
Joined: 20 Jan 2003
Posts: 1278

Hi Emma,

A free float greater than total float means that some activities have negative float; negative float comes from unsatisfied No Later Than constraints

Let's say Activty A starts today, is 6 working day long and has a NLT constraint next Friday; P6 gives the activity a 1 day negative float.

Alexandre