Changing a date without changing % complete in MProject 2000?

P

pngeneral

Once a task has begun and I have added a value in the % complete column, is
there a way to change the start or finish date of the task without changing
the value I set in % complete?
 
G

Gérard Ducouret

Hi,
Use the Update Tasks dialog :
Tools / Tracking / Update Tasks
Here you have everything you need, especially the Actual Start and Actual
Finish

Gérard Ducouret
 
P

pngeneral

Hi Gerard.
Thank you for responding. Unfortunately, it seems to produce the same
results. I went in through tools/tracking/update tasks and altered the
finish date; It still changed the percent complete. Is there something else
I need to set to make your way work?
 
J

Jan De Messemaeker

Hi,

Percenyt complete IS a calculated field.
Using it for input is at your own risks :)
Use Physical % Complete to indicate your estimate regardless of durations.
HTH
 
G

Gérard Ducouret

Instead of % in the Update Tasks dialog, use the Actual duration and
Remaning duration : it's a lot easier, and Project will recalculate the %

Gérard Ducouret
 
S

Steve House [Project MVP]

Percent complete refers to duration. If I have a 10 day task and it is 50%
complete, that means I have actually worked 5 days out of the 10 total days
to be worked. Now I change the finish date to one that is 5 work days
later - that means the total duration for the task is now 15 days, not 10.
But we have still only worked 5 days. 5 days worked out of a total of 15
days to be worked means the task is now 33% complete. How could it possibly
be anything else? Project must either change it or lie to you.

One needs to be very careful when using "% Complete" to be certain to
compare apples to apples. There are actual 3 separate and distinct measures
of % Complete. Just plain "% Complete" referes to duration. Work is
measured with "% Work Complete" which may, or may not, be the same number as
the duration measure. And finally actual physical progress on the task - I
have to proofread 100 pages and have finished 50 of them - is measured by "%
Physical Complete." When you say a task is "50% Complete" you must be
absolutely crystal clear *which* completion measure you are talking about.

Here's a case in point - I have to paint 2 walls with several coats of
paint. We have to allow overnight drying time for each coat. My schedule
has me starting Monday at 8am with the first primer coat and that takes 1
hour to apply. Same on Tuesday. First colour coat goes on Wednesday and
takes 1 hour. Same on Thurs for 2nd colour coat. Finally we have to spend
8 hours on Friday finishing up with a lot of timeconsuming detail work and
that's expected to take 8 hours. Duration = 40 hours, Work = 12 hours. Now
it's Thursday afternoon and everything has been worked according to plan but
looking around the room we see only one wall has finished with painting and
is ready for detailing, the other still needs its 2nd colour coat...
% Complete = 4days/5days = 80%
% Work Complete = 4 hours/12 hours = 33%
% Physical Complete < 50%, maybe 40% (hard to estimate)

HTH
 
P

pngeneral

Hi Steve.

What you wrote makes complete sense. I dd get excited because I thought you
were saying that if I used one of the other % complete fields (to either %
Work Complete or % Physical Complete) Project would not recompute the
percentage when I change the date. Unfortunately, that isn't what I found.
% Physical doesn't exist as a choice (not that I saw) and % Work Complete
always seems to match % Complete...

Perhaps what you are all trying to tell me is that what I want to do just
can't be done.

Thanks to all who have written.
-PLN
 
S

Steve House [Project MVP]

You absolutely, positively cannot "mix and match" the % completes. Before
anything else, when you are entering a task is "XX % Complete" be absolutely
certain just exactly what information you are conveying about the task? Are
you saying that out of such and such an estimated duration we have worked a
certain percentage of the time? Are you saying out of YY estimated
man-hours required to complete the task we have used up a certain percentage
of them? (And remember, man-hours of work and hours of duration ARE NOT the
same thing and are not necessarily equal to each other, even though both use
the units "hours"!) Or are you saying that or the total amount of "stuff"
that the task is required to deliver, you have done XX percent of it?

Normally when you enter a task is XX% Complete or work is YY% Complete,
Project keeps the two linked so updating one also updates the other to the
same percentage. That's because work usually proceeds evenly through the
task and so when we have passed over 50% of the time that it will require we
will have also done 50% of the work that is required. But that is by no
means always true. To cover those cases where work does not proceed at an
even pace, in the Tools, Options menu, Calculation tab there is a check box
labeled "Updating task status updates resource status" and if you clear that
check box it breaks the link and lets you enter them independently.

You can find % Physical Complete by displaying the default tracking table:
View, Tables, Tracking. Since you said you were entering actual starts and
progress I assumed you already had that table open since that's the best
place to post progress. If you want to see it in some other tables, right
click on the column headers and add the column "Physical % Complete"

No offense intended but the reason what you are trying to do can't be done
is because what you say you want to happen simply does not make any sense
and violates the basic rules of arithmetic. The duration is the total
amount of time on the working time calendar between when the task starts and
when it finishes, finish date minus start date ignoring non-working time on
the calendar. If the start date is locked in because some work has taken
place - actuals record real historical events and reflect what really and
truly happened when it happened - and you change the finish date, the
duration MUST change - the length of time between Sept 1st and Oct 1st is
longer than the length of time between Sept 1st and Sept 15th. An Actual
Duration is just what it says it is - if I have worked on the task for each
of 5 days between Sept 1st and now, my actual duration is 5 days. If my
expected duration is 10 days I've worked 50% of it. If my expected duration
is 20 days, I've worked 25% of it. If I've worked 5 days and my duration
was at 10 but that now changes to 20 because I adjust the expected finish
date (ie, the estimated duration is revised), the percent complete displayed
must drop from 50% to 25%. Anything else would be like claiming 2+2 should
equal 22.


HTH
 

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