Calendar - Changing hours per day

[LynnF]

When I reduce the number of hours per day from 8.00 to 7.50, the duration for
project activities increases, but I don't see an equivalent change in the
dates. Am I missing something?

 

[Mike Glen]

Hi Lynn,

Welcome to this Microsoft Project newsgroup

You might like to see FAQ Item: 5. Default Working Hours

FAQs, companion products and other useful Project information can be seen at
this web address: http://www.mvps.org/project/

Hope this helps - please let us know how you get on

Mike Glen
Project MVP
See http://tinyurl.com/2xbhc for Project Tutorials

 

[davegb]

When I reduce the number of hours per day from 8.00 to 7.50, the duration for
project activities increases, but I don't see an equivalent change in the
dates. Am I missing something?

Did you also change the working days on the calendar? The Hours/day
and Hours/wk are just conversion factors. Project uses the "Tools,
Change Working Time" calendar to figure out the schedule.

Hope this helps in your world.

 

[Lynn]

The FAQ suggests making these changes before data is entered into the
project. Idon't have that option. When I tried making the suggested
modification in TOOLS>CHANGE WORKING TIME, the durations increased, but
activities 'finished' sooner, which isn't logical.--
-Lynn F. PMP

 

[Lynn]

I changed it in both places.
--
-Lynn F. PMP

Did you also change the working days on the calendar? The Hours/day
and Hours/wk are just conversion factors. Project uses the "Tools,
Change Working Time" calendar to figure out the schedule.

Hope this helps in your world.

 

[Mike Glen]

Hi Lynn,

If you change the working times, Project will not change the data you've
already entered. You will need to re-enter the Durations of those tasks,
New tasks will adopt the new settings.

Mike Glen
Project MVP

 

[Steve House [MVP]]

The durations actually aren't changing. Durations are always recorded and
tracked in units of a minute to the nearest tenth. Display in units of
days, weeks, etc, are there for user convenience only but they aren't the
"real" duration and the numbers you see depend on the conversion factor
designating the length of a "standard day" found on the Calendar Options
page. If a "day" is defined as 8 hours, the 480.0 actual duration minutes
between 8am and 5pm will display as 1 day. But if you redefine a "day" to
be 7 hours, the 480 minutes of real duration between 8am and 5pm will be
displayed as 1.14 days, not because the duration changed - it hasn't - but
because you changed the conversion factor for how much duration will be
called "one day" in the display.

Steve House
MS MVP - MS Project