When dispatching and rescheduling operations you should consider the following points:

• If the new start date for the operation is in the past, the system writes a warning message in the planning log.

• If the operation is partially confirmed and the new start date is before the actual finish date, the system does not dispatch or reschedule the operation. The system writes an error message in the log.

When dispatching internally processed activities in networks, you should consider the following:

• If the operation has a start constraint "must start on", the new start date must be the same as the constraint date.

• If the operation has a start constraint "cannot start before", the new start date must be later than or the same as the constraint date.

• If operation has a start constraint "cannot start later", the new start date must be earlier than or the same as the constraint date.

For the following checks for networks, the system first has to schedule the activity in order to calculate the finish using the new start dates. You should consider the following points:

• If the activity has a finish constraint "must finish on", the new finish date must be the same as the constraint date.

• If the activity has a finish constraint "cannot finish before", the new finish date must be later than or the same as the constraint date.

• If the activity has a finish constraint "cannot finish later", the new finish date must be earlier than or the same as the constraint date.