the case for and against putting a Float Activity at the end to keep critical path zero for simplicity etc.

Member for

16 years 3 months

why not just set the threshold and define the critical path to what ever float that you have  

go to tools

schedule 

options

Define critical activities as 

Total float less than or equal to 

then put in your value.

the other option is to never set a project must finish by date or have a fnish on or before milestone this way the float wil ALWAYS be zero