Hello Elle -
More than likely a predecessor task is finishing later than you think.
Check all of the following
Tools/Options/View tab. change date format to include hh:mm so you can see.
Now it becomes a matter of chasing predecessors, etc.
Tools/Options/Calendar tab. Verify start time for the day
Project/Project Information. Note the calendar assigned (default is
"standard")
Tools/Change Working Time. For each calendar assigned to your project
(from the "For:" drop down), verify start and stop times and if there are
exceptions
If you look at each calendar there, you should also be verifying resource
work calendars (they come from the same place).
Although rare, it is possible an individual worker has an exception listed
in their availability. On the resource sheet, doulble click the resource
name. On the General Tab, you will see their work exceptions. If you have
dates set to show hh:mm something may also show up there. It is a little
different in P2003 and P2007 but it is in there.
For the task in question, verify the task type is "As soon as possible" and
the assigned calendar. Both are available from the Advanced Tab of the Task
Information dialog box. If the calendars says "none" it means it is using
the same calendar specified for the poject (Project/Project Information)
--
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Jim Aksel, MVP
Check out my blog for more information:
http://www.msprojectblog.com