Activities are sorted based on time, the activities will not be
planned.
From Start Time Activities
The start time of the first activity in a group to be planned is
the earliest start time of the activity. If no earliest start time is specified
for the activity, the planned start time (a mandatory field) will be
used.
From Specified Time
The start time of the first activity to be planned is defined by
the user in field Plan Forward From. The time in this field is the
start time of the first activity in a group to be planned. When no start time
is specified LN displays an error message.
From Finish Time Orders
The start time of the first planned activity to be planned is
the finish time of the last service order with the same characteristics as the
planned activity. This option is only applicable for planned
activities.