Detailed control concerns the slack drowned in
each single customer order. First, it uses time fences
to prevent Sales from creating excess inventories in
the downstream stages of the production process.
In Telcom, for example, forecast orders are not
allowed to drive the Final Assembly Schedule.
Time fences can also be set according to the heterogeneity
of different markets. Second, detailed control
performs a preliminary simulation of MPS and
MRP to detect rescheduling messages due to both
lacks of capacity (related to order releases planned
in the current period) and shortage of materials.
These messages may occur if several large orders
concentrate in the same time period, if uncertainty
about a forecast order is late in decreasing, if a customer
places a request previously unforeseen or if
the estimated due date has to be anticipated. Since
information on the slack is implicitly possessed by
Sales, rescheduling messages can be dealt with only
through organizational mechanisms. These mechanisms