Your company may work 24 hours a day but that does not mean your project
calendar should be the 24 hour a day one. The Project calendar
determines how tasks will be scheduled when they do not yet have
resources assigned to them or won't have resources assigned to them. So
if a task starts on Monday at 8am and will take 40 hours of work to
achieve, when will it finish? The standard 8-hour calendar says it will
finish Friday at 5pm. The 24-hour calendar says it will end at Tuesday
night at midnight. Now consider - when you breakdown your tasks you
should carry them down to the level of detail of one task is the work to
be done by ONE resource. So if Billy Bob is going to be assigned to
polish the fids and there's enough of them that it's going to take him
40 hours to do them all, when he starts Monday morning is he going to
work steadily until they are done, never taking a break for meals, never
taking a break for rest, not sleeping or seeing his family, until all
the fids are polished, even if its days or weeks or months? That's what
using the 24-hour calendar as your project calendar implies. Machines
work that way but I've never heard of people doing it.
Tasks follow the calendar of the resource assigned to them. If I use
the 8-hour calendar as my project calendar and I initially put in
"polish fids, 16hours" Project schedules it Mon at 8am until Tues at
5pm. If I assign it to Billy Bob who works days it stays at those
hours. If I assign it to Mary who works swing shift, it moves
automatically to start at Mon at 3pm and end Tues at midnight. If I
assign it to Frank who works graveyard, it moves to start Mon night at
11pm and finish Wed morning at 8am. This is an accurate way of modeling
and predicting what will happen in your project while the 24 hour
calendar is not.
The calendar options page does not change the default calendar in any
way. That page is actually a set of conversion factors and is not
connected to the calendar. You set the Project Calendar in the Project
Information page of the Project menu - there you can select any calendar
you like. If one does not exist that meets your work hours requirments
you create it in the Tools, ChangeWorkingTime menu and define a new
calendar to add to the list. Create the calendar that best describes
the most common work shift of the people who work on your project and
make that the project calendar, then go to the options page and revise
the default start and end times and the hours per day etc to match your
calendar. Don't forget to allow time for lunches and rest periods when
you describe your workday.
DO NOT enter or import start and end times for your tasks when you enter
the task names. Project job is to calculate those for you based on the
date the project starts, the relationships between the tasks, and the
availability of resources. If you try to enter start and/or finish times
for each task you will come to no end of grief with a project plan that
doesn't even remotely resemble reality.
--
Steve House
MS Project MVP
Visit
http://www.mvps.org/project/faqs.htm for the FAQs
Fede said:
Hello all,
I'm trying to import some data(activities, duration,start and stop
time, resources) in project97 from a text file. The problem is that my
company works 24 hours per day, but the standard calendar is from 8 A.M
to 5 P.M. Is it possible to change the default startup calendar to 24
hours per day? I've tried to change calendar related options from menu
but nothing happened.