Dissolving Activities and Retain Lag in Primavera P6 PPM
When an activity is deleted then a chain of logical activities is broken. The Edit, Dissolve command and the right-click Dissolve command will delete an activity and joins the predecessors and successors with a Finish-to-Start relationship.
P6 Version 19 introduced the ability to retain lag when dissolving activities.
Aim
The aim of this paper is to explain how the new P6 Retain Lag function operates.
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Dissolving Activities and Retain Lag
When Retain Lag is selected from the User Preferences, Calculations tab, the dissolved activities predecessor and successor lags will be added together to calculate the lag in the new relationship.
The picture on the right shows three tasks before Dissolving Activity 2.
This shows what happens after Dissolving Activity 2 in P6 Version 19 or later without Retain Lag checked or in earlier versions of P6.
This shows what happens after Dissolving Activity 2 in P6 Version 19 and later with Retain Lag checked.
You will see that the predecessor and successor lags are added together.
By default, Retain Lag is not switched on and has to be activated by the user from the User Preferences, Calculations tab.
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