Re: Duration calculation
- From: "Steve House" <sjhouse at hotmail dot com>
- Date: Mon, 16 Jul 2007 19:28:30 -0400
Very likely, when you initially setup the project your working times were 8am to 5pm. Thus the Project start date (Project menu, Project Information, Start Date) was set to and is still saying "MM/DD/YYY 08:00AM" A subsequent change of the hours of work to be 07:00 to 17:30 will not affect fixed dates such as the project start that have already been set. So even though your hours of work start at 07:00, the project doesn't officially start until an hour into the first day has passed, causing all your downline times to be offset by an hour as well. A 1 day task starting on Monday will finish on Tuesday, not the end of the day Monday as you might expect, because it isn't starting at the start of the workday and yet requires the number of hours in a full workday before it's done.
Remember that the base calendar for working times sets the default work schedule for each individual in your team. Are you seriously saying that your people don't ever get a day off, never take a meal break or whatever? I doubt it. Yet a 0700 to 1730, 7 day a week working time calendar without breaking out the meal period says exactly that. Disregarding lunches, days off etc leads to very signifigant errors in scheduling and budgets and I urge you to rethink that approach. A worker doing 0700 to 1730 doesn't produce 10 1/2 man-hours of work, you have to back out the meal period from that time to be accurate.
--
Steve House [Project MVP]
MS Project Trainer & Consultant
Visit http://www.mvps.org/project/faqs.htm for the FAQs
"trevor" <trevor@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:A9640D01-6DD3-436C-AF6B-73FA5E14AF19@xxxxxxxxxxxxxxxx
I defined my working times as 7am to 5:30, 7 days a week. However, when i
change the date format to show times, it shows all tasks starting at 8am and
ending at 8am. There are no resources assigned. Additionally, when i try to
change the finish time to something else, the start time changes as well.
Thanks for helping me figure this out!
trevor
"Steve House" wrote:
What time does the task start on 7/21? What time does it end on 8/25? (Go
to the Tools/Options menu, the View tab, and select a date format that
displays the time as well as the date).
Remember that duration is always measured in minutes and fractions of a day
at either end can make the real duration slightly off from the number you
get counting dates on a calendar. For example, with a normal 8 hour workday
with working time of 8am to 5pm, a task that begins at 1pm on Monday and
finishes at noon on Wednesday has a 2 day duration, not 3 days as you might
expect if you simply looked at the dates - starting Mon and ending Wed - and
ignored the times. Each 8 hour interval is a day. Monday afternoon is 1/2
day, Tuesday is 1 full day, and Wednesday morning is the final half day,
giving from Monday apparently through Wednesday a total duration of 2 8-hour
days.
--
Steve House [Project MVP]
MS Project Trainer & Consultant
Visit http://www.mvps.org/project/faqs.htm for the FAQs
"trevor" <trevor@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:0E19AD7B-98DC-44FA-9171-7E99ED84E372@xxxxxxxxxxxxxxxx
>I checked to see if there were any non-working days in the change >working
> time and there were not. Still confused about it.
> trevor
>
> "JulieS" wrote:
>
>> Hello Trevor,
>>
>> Well obviously, I was not thinking straight or something. Either too
>> much coffee or not enough. When I create a task with a start date of
>> July 21, 2007 at 8:00 am and enter a 35 day duration, I show August >> 24,
>> 2007 at 5:00 pm as the finish date. A duration of 36 days gives me
>> August 25, 2007. Is it possible you have one nonworking day in >> between
>> those dates?
>>
>> Sorry for any ealier confusion.
>>
>> I hope this helps. Let us know how you get along.
>>
>> Julie
>> Project MVP
>>
>> Visit http://project.mvps.org/ for the FAQs and additional information
>> about Microsoft Project
>>
>>
>> "JulieS" <passport6847 at maine dot rr dot com> wrote in message
>> news:e1LNHxZxHHA.4076@xxxxxxxxxxxxxxxxxxxxxxx
>> > Hello Trevor,
>> >
>> > You have obviously modified the project calendar to allow every day
>> > (Sunday through Saturday) as working time. What hours (8:00 am to
>> > 5:00 pm ?) do you have set? If you haven't modified the 8:00 am to
>> > 5:00 pm and haven't modified the definition of the number of hours >> > in
>> > a day from default (8 hours) then from July 21, 2007 8:00 am to >> > August
>> > 25, 2007 5:00 pm *is* 35 eight hour time slots, thus 35 "days" not >> > 36.
>> >
>> > See FAQ #5 at http://project.mvps.org/faqs.htm for some additional
>> > information.
>> >
>> > I hope this helps. Let us know how you get along.
>> >
>> > Julie
>> > Project MVP
>> >
>> > Visit http://project.mvps.org/ for the FAQs and additional >> > information
>> > about Microsoft Project
>> >
>> >
>> > "trevor" <trevor@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>> > news:E0983075-0299-4A81-BBA8-296889C43208@xxxxxxxxxxxxxxxx
>> >>I have a schedule that spans from 7/21 to 8/25. Project is telling >> >>me
>> >>the
>> >> duration is 35 days, but when I count the days on the calandar, its
>> >> 36 days.
>> >> I need the proper count to show.Thanks.
>> >
>> >
>>
>>
>>
.
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