Guild of Project Controls: Compendium | Roles | Assessment | Certifications | Membership

Tips on using this forum..

(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?

(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.

Show Longest Path with Positive Float

3 replies [Last post]
Diane Resenna
User offline. Last seen 3 years 33 weeks ago. Offline
Joined: 1 Mar 2016
Posts: 9
Groups: None

Hello,

In a schedule where all task-dependent activities have positive float, is there a way to show the longest path with that positive float?

 

For instance, a project is awarded 01-Jan-17 and the contract completes 01-Jan-18.

The 'Contract Complete' schedule activity in the schedule needs to show the fact it completes on 01-Jan-18.

However, if there is float on the activities, I'm unable to find a way to show the longest path. I can do so by changing the constraint on 'Contract Complete' to finish on or before, but then it's not true those days have 0 float.

 

Any ideas are appreciated. Thanks!

Replies

Gary Whitehead
User offline. Last seen 4 years 46 weeks ago. Offline

Diane,

 

From the terminology you use, I think you are using Primavera P6?

If so you can set a Project-level "must finish by" constraint of 1st Jan 18 from within the Enterprise>Projects screen, then delete the contractual milestone, and filter on longest path.

Should get you what you need.

 

The other option if you are wedded to the contractual milestone being there, is to work out how much float the longest path has (typically how much float your planned completion milestone has), and then filter for total float less than or equal to that value.

This second approach may give you some spruious results if you have other hard constraints in your schedule, or use multiple calendars which can confuse Primavera's float calcs.

 

Cheers,

G

Rafael Davila
User offline. Last seen 13 hours 40 min ago. Offline
Joined: 1 Mar 2004
Posts: 5229

You can keep fixed in place the Contractual Milestone(s) with start and finish date constraints, without any successor to avoid negative float. Then using the Hammock, a task that will consume delays and reduce in duration without having an impact on your Contract Completion date you can model Terminal Float and Critical Chain Project Management [CCPM] as well.

If the project is delayed because of the contractor there will be no change in contract finish milestone and therefore if there is Terminal Float available it will be reduced at his expense.

BF333 photo BF333_zpsaahkugfw.png

Charlotte Underhill
User offline. Last seen 6 years 1 day ago. Offline
Joined: 4 Jul 2016
Posts: 15

Hi Diane,

Which contract is this under? If it is NEC3 then you are entitled to Terminal Float (this is time owned by the contractor), You can place a bar above contract compltion to on theory fill the gap, if using Asta PP you can use the buffer task function which is task that will consume delays and reduce in duration without having an impact on your Contract Completion date. 

I hope this helps.

Charlotte.