rebaselining after plan maintenance

[gac]

After BLing my plan, 4 weeks worth of actuals have been accrued so far. I
now realized that there is a task (32 hours) which should not have been part
of the BL. In order to remove it, I plan to zero out the Work, Duration, BL
Work and BL Duration fields. Then I plan to save a new baseline of the one
selected task. Project then warns me that I'm about to overwrite my
original BL.

This is where I chicken out and don't know where to go next? I see that I
can pick one of 10 other BLs. Then I start to question what amount of plan
maintenance warrants consuming one of the 10 precious BLs I can use.
Because I also have a new task which wasn't part of original BL which I now
need to include. (approved scope change) And I also want to replace a task
with 7 more granular tasks. (of same total work as original one task)

I'll be doing this sort of maintenance ongoing throughout the life of my
project(s). Any guidance on when to use full BL versus interim BL would be
most appreciated.

Also, I tested what would happen if I overwrote the original BL for my
deleted task. The results were not clear to me at all. The project-wide
summary task originally showed 5545.5 hours of BL Work, however the deleted
task is only a 32 hour task. The new BL Work value has 5401.33. The
difference between BL Work before and after the rebaseline is not the 32
hours I would have expected. Any ideas?

 

[Haris Rashid]

hi,

A baseline is the set of original start and finish dates, durations, work,
and cost estimates that you save after you've completed and fine-tuned your
project plan but before the project begins. It is the primary reference point
against which you measure changes in your project.

Because the baseline provides the reference points against which you compare
actual project progress, it should stay fixed. You should not change the
baseline information if the project has entered execution and you need to
refer to the original baseline. However if the change is such that the
baseline should change, then you should let project change the baseline. An
alternate is to have multiple baselines that provide snapshots of extensive
project data during the various stages.

Regards,