different work hours for different resources

[Kesavan]

Hi
I want to assign different work hours for different resources. Say for
eg. R1 has productivity of 7 hr/day, R2 has 6 hr/day. When I assign R1(100%)
to a task (Fixed work based) which takes say 21 hrs, the duration should be 3
days. For the same number of hours, R2 will take 3.5 days.
How do I achieve this?
I tried creating two different calendars one with working hours of 8: 12
and 1:4
and the other with working hours of 9:12 and 1:4. It does not reflect the
way I was expecting it in the Gantt Chart.
Any suggestions how I do this?

 

[Rod Gill]

Hours in the calendar have NO effect on duration, they only effect the
calculation of the finish date and time. For resources with differing hours
per day input, enter or edit the appropriate units.So 6h/d availability is
units of 75%, 7h/day is 87.5%

 

[Steve House [Project MVP]]

Note that regardless of task type, when you assign the FIRST resource(s) to
a task Project assumes that was what you had in mind you were going to do
when you made that duration estimate and thus won't change it. Also,
Project doesn't have a clue what the work requirement represented by theat
duration might be until after you've made the intial resource assignemnt.
Joe works an 8 hour day. If I have Task X with a duration of 5 days and
assign Joe at 100%, Project calculates the task requires 40 man-hours work.
But if I initially assign Joe at 50% instead, Project calculates the task
requires 20 man-hours but keeps the duration at the same 5 days. It's only
if I assign Joe initially at 100% and then EDIT his assignment to something
else will Project calculate a new duration value.

The duration of a task is exactly the same whether the calendar of a
resource assigned 100% shows he works a 4 hour day or an 8 hour day. But it
will take twice as many elapsed time calendar days to "burn up" that
duration for a 4 hour a day resource as it does for an 8 hour a day one.

If Joe who works an 8 hour day is assigned 100% to a task beginning Monday
that requires 40 man-hours, it will finish Friday at 5pm after 40 duration
hours. Each workshift is 1 8-hour duration day.

If Joe who works an 8 hour day is assigned 100% to a task beginning Monday
that requires 20 man-hours, it will finish Wednesday at noon after 20
duration hours. Each workshift is 1 8-hour duration day.

If Joe who works an 8 hour day is assigned 50% to a task beginning Monday
that requires 20 man-hours, it will finish Friday at 5pm after 40 duration
hours. Each workshift is 1 8-hour duration day.

If Bill who works a 4 hour day is assigned 100% to a task beginning Monday
that requires 40 man-hours, it will finish a week from Friday, 10 working
days, but still after 40 duration hours. Each workshift is 1/2 of 1 8-hour
duration day and so it takes 2 working shifts, spread over 2 calendar days,
to equal 1 duration day.