Because it is the only task with zero total slack. Critical path is calculated by project. Without further information - I can't give a more complete answer, sorry.

Hi Julie,
Please find attached here a sample project file.
Project A has duration of 3 days, B has 2 days and C has 1 day.

Please review the network diagram. Task A is on Critical path. If you change the duration of the tasks B & C as 3 days each, then they will also become "critical".

Even if you change the start date of Task A to June 05, 2013 (keeping the same duration), it will show Task A as "critical".

Will you please explain why this happnes?

Thanks

Attached Files

Project1.pdf (9.2 KB, 17 views)