Effectively planning a project timeline starts with
gathering the appropriate inputs to develop schedule process. And spending the
time to carefully plan the activities, sequence them, define durations by
gathering this data from performing resources, build resource calendars and get
estimates is critical to the project.
It ensures a great start, good data and estimates that are
better than just an educated guess.
But, I often find many holes in the scheduling exercise.
You have to deal with a lot of details about the activities
being planned, the maintenance windows, resource availability (or
unavailability), the timing and sequencing of activities, the amount of detail
we have vs. the amount we actually need, etc.
I find it helpful to map out key activities on a wall, with
the critical path being set and clear. Then I break the activities down and put
the similar chunks of information together.
You don't always get a complete picture of the schedule--it's
a progressive process. And you sometimes you miss some things when you don't
visualize all the steps that you have to go through. But it fleshes out the
dependencies and the risks.
Of course a lot depends on the project itself, how much
information is already available and how much knowledge the person who does
scheduling has about the technical side of the project itself.
Many project managers tend to bypass this process or
minimize it and leave it to the day-to-day "figuring out" process, rather than
planning the scheduling sessions with the team. That reduces the quality of the
overall plan and forces the project to go through more changes than it has to.
Controlling
the project schedule is a process that is done a lot easier when the upfront
work is done. Coupled with accurate reporting on project status, the schedule
can be easily adjusted and kept up to date and relevant, without constantly
re-baselining the schedule.
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