Hi,
The summary task calculates its duration based on the hours per day, days
per week and weeks per month set in Options calendar. Since the tasks may
have a diffeerent calendar to the project calendar then yes the summary task
may well have a different duration to the of the underlying tasks. The
summary task is merely looking at the earliest of the start times forthe
underlying tasks, and the
latest of the finish times of the underlying tasks and then calculating the
duration based on the difference between that start and finsh and as defined
under the options. The underlying tasks might say all be five day tasks on
a five day calendar (set under Change working time) and show 'correctly the
five day task spanning from Wednesday to Tuesday, the Summary Task will also
show start on Wednesday and Finsh on Tuesday, but since the options are set
for a seven day week, then the duration will show as seven days not five.
Hence the confusion that can arise.
Definately a little 'trap' to be aware of, especially when people see the
differences between the task durations and the summary task duration.
Hope this helps
