Calculating Critical Path - Can't figure out LF

whazzzzzupp17

New Member
Joined
Jul 23, 2018
Messages
21
Hello, I'm having some major problems trying to calculate this and been working on determine LF all day.

I tried Index match to lookup all the predecessors, but I think I need to us MINIF(), but it keeps outputting 0


ESEFLSLFPredecessorDuration
2/1/212/1/21=LF - Dur
2/2/212/2/21=LF - Dur1
2/3/212/8/21=LF - Dur2
2/2/212/4/21
=LF - Dur
1
4
 

Excel Facts

Test for Multiple Conditions in IF?
Use AND(test, test, test, test) or OR(test, test, test, ...) as the logical_test argument of IF.
Calculating LF is not simple because you have to work forwards through dependencies and calculate slack, and determine what is the critical path. In this example, the critical path is 1 -> 2 -> 3. Task 4 is not on the critical path because it has 4 days of slack. To calculate slack you have to work through all the possible forward dependencies on all tasks. I have done this in an Excel VBA version of Microsoft Project, and I just don't think a general solution can be done simply with formulas.
 
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