Patrizia --
Resources are not allowed to change the Duration of a task assignment in
Project Web Access. The assumption behind this is that estimating Duration
is the responsibility of the project manager.
On the other hand, resources can enter an Actual Start date for a task. In
order for them to do so, however, you need to "push" the Actual Start field
(and perhaps Actual Finish, as well) to each user's timesheet. To do this,
complete the following steps:
1. Open the project in question
2. Click Tools - Customize - Published Fields...
3. From the list on the left, select the additional fields you want and
copy them to the list on the right
4. For each field you select, make sure you have selected the "Let resource
change field" option
5. Click the OK button
6. Click Collaborate - Publish - Republish Assignments and click OK
7. Repeat these steps for every project which is already published in which
you want to use this method of tracking
Hope this helps.
--
Dale A. Howard
Enterprise Project Trainer/Consultant
Denver, Colorado
http://www.msprojectexperts.com
"We wrote the book on Project Server"