Affect on SPI?

[Joe]

Does the following scenario affect the SPI in a negative way?

Suppose someone works on a task and completes it. The task is now marked
100% complete. About a week later there is some additional re-work needed.
The person tracks his actuals to the same task. The task is still 100%
complete.

I understand that the CPI would be impacted negatively because there is now
more cost incurred. What about the SPI? Has the finish date changed,
thereby affecting the SPI too?

 

[Steve House [MVP]]

I suppose it depends on how you want to look at it. In the classic view,
all tasks produce a deliverable. The task isn't done until the deliverable
is complete. The task finish date is the moment in time when the last bit
of work is performed on that deliverable. So in that sense, your task isn't
actually complete until the re-work is completed.

OTOH, you may wish to consider the rework to be a whole new task, especially
if it is or could be performed by a different resource than the one who did
the original work. In that case, you'd add the rework as a new task to the
plan and post the work performed against it.

 

[Joe]

Steve,

While I agree with your response, it did not answer my question.

The question is, if a task is marked complete, then more work is added to
the actuals later on, does this affect the SPI.

Regardless of if this should be done, I am asking if the SPI is affected.

Thanks,

Joe

 

[Steve House [MVP]]

Sorry, misread the question - SPI would not be affected since it compares
BCWP with BCWS. The additional hours affect the ACWP but we had budgeted
for XX hours prior to the status date when we saved the baseline and posting
actuals in excess of that doesn't retroactively change the budget.

Task A was estimated at 5 days, 8 hours per day and the baseline reflects
that estimate. It took 10 days to do. Status date is sometime after the
10th day.

Date 1 2 3 4 5 6 7 8 9 10
BCWS 8 8 8 8 8 0 0 0 0 0 = 40
BCWP 8 8 8 8 8 0 0 0 0 0 = 40
ACWP 8 8 8 8 8 8 8 8 8 8 = 80


--
Steve House [MVP]
MS Project Trainer & Consultant
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