... the project behind as well.Keeping in mind that this is the 10 - Minute Guide to Project Management and not a 480-page tome, let's look at how you could use PERT/CPM to manage a simple project. ... need to be complete.● For Tasks 8, 9, and 10 , only Task 7 needs to be complete, as Tasks 8, 9, and 10 all start at the same time.● For Task 12 , "install software," Task 10 needs to ... complete, but Task 11 , which is scheduled to start after, does not. You may wonder, "Why not switch Tasks 11 and 12 in the Gantt chart?" The answer is that Task 11 , "developed...