There are two important schedule compression techniques that you can use to bring in your project’s milestone dates…but each has its own cost.
Crashing
Crashing the schedule means: Adding resources or
moving them around to shorten it. Crashing ALWAYS
costs more and doesn’t always work!
There’s no way to crash a schedule without
raising the overall cost of the project. So, if
the budget is fixed and you don’t have any
extra money to spend, you can’t use this
technique
When you absolutely have to meet the date
and you are running behind, you can
sometimes find ways to do activities more
quickly by adding more resources to critical
path tasks
Fast-tracking
Sometimes you’ve got two activities planned to occur
in sequence, but you can actually do them at the same
time.
This is pretty risky, though.
There’s a good chance you will
need to redo some of the work
you have done concurrently
If you see something about “overlapping
activities,” it’s talking about fast-tracking