The worksheet details sheet is the timesheet that is automatically created when you start a new job. That timesheet will be directly associated with a job dispatch that has been received in the jobs application.

The new timesheet allows you to record time that you spent with a customer without a job dispatch. For example, if you were at a client site doing a job for them and they asked you to work on something else because you were already there, you would create a new timesheet for the 2nd job that the client has asked the technician directly to do. This allows you to skip some steps and create a timesheet without a dispatch, rather than the customer taking the normal process of calling in, getting a quote, and having a technician dispatched to them.