You can use this heuristic, which is based on the algorithm /SAPAPO/HEUR_CDOC, to create a new planned order or make quantity adjustments to an existing planned order with a view to achieving better capacity utilization for a certain resource.
Restrictions
The adjustment of the order quantity is carried out taking the capacity of the selected resource into account. If an order takes up further resources, the capacities of these are not taken into account in the quantity adjustment.
The heuristic can only be used for resources with
time-continuous capacity
(single and multiresources).
Bucket resources
cannot be scheduled with this heuristic.
The heuristic does not necessarily achieve 100% utilization. This means that gaps in utilized capacity may remain even after you have executed the heuristic.
In the case of a single resource, the operation that is to be newly created or extended cannot be created on the selected resource over a period in which another operation already lies. This means that the temporal gap in which the operation is to be scheduled must not be interrupted by other operations.
You cannot integrate the heuristic into a
production planning run
.
You can invoke the heuristic interactively, starting from the following applications:
Detailed scheduling planning board
Resource planning board
Product planning table
Order processing view
You have made the
heuristic settings
via the IMG activity
Maintain Heuristics
in Customizing for Production Planning and Detailed Scheduling. The heuristic is supplied in standard customizing with the name SAP_PP_CDOC.
The heuristic can be executed in three versions, depending on the
execution type
that you specify in the
heuristic settings
:
Heuristic for creating a new planned order
Heuristic for increasing the quantity in an existing planned order (extend forward)
Heuristic for increasing the quantity in an existing planned order (extend backward)
When creating a planned order, the system proceeds as follows:
The explodes the selected
source of supply
. The start date of the gap in utilized capacity is used as the
explosion date
. A check is made as to whether the source of supply is valid as at this date. The system creates an order with the smallest possible quantity.
The system performs a lot-size calculation for the order to fill the gap as optimally as possible.
If you work with
fixed lot sizes
, the system may have to create several planned orders to be able to fill the gap. You can limit the number of planned orders to be created in the
Maximum Number of Orders
field in the heuristic settings.
The system can perform this quantity calculation using two different
procedures
, which you can specify in the heuristic settings.
Iterative procedure
Linear procedure
The system saves the newly created order(s).
Procedure when invoking the heuristic on the
detailed scheduling planning board
:
In the
Resource View,
you discover that there is a gap in the capacity utilization of a resource in a certain period. You wish to improve resource utilization during this period.
To execute the heuristic, you can select the following objects on the detailed scheduling planning board:
The resource, or
An operation, or
Two operations at a resource between which the gap to be closed is located.
You invoke the heuristic.
The system may present you with a dialog box in which you can enter additional information for the execution of the heuristic. As a rule, this is only the case when you create a new order, because you then have to choose the source of supply.
Whether or not the system presents you with the dialog box depends on whether you have set the
Do Not Display Dialog Box
indicator in the
Heuristic Settings
and have yet selected an operation in the interactive application. In this case, the dialog box does not appear, since it is already clear that the selected operation is to be extended in order to fill the temporal gap.
The dialog box is subdivided into the following areas:
Execution type and specification of operation dates/times
In this area, you see whether a new order is to be created or an existing one adjusted. This depends on the
heuristic settings
. You also specify the
operation start and end dates/times
where necessary
.
Selection of source of supply
when creating a new order, you can choose a source of supply in this overview of possible sources (PPM or PDS). The system shows you all sources of supply in which the selected resource is used.
Information on current source of supply
In this area, all information on the selected source is displayed. This includes, for example, the warehouse stock of the product to be scheduled and the necessary components with their ranges of coverage (time supplies).
When you have completed your input in the dialog box and pressed
Enter
, the system starts the execution of the heuristic.
Depending on the setting of the heuristic, the system either creates a new planned order or increases the quantity of an existing one, thus filling the gap in utilized capacity.
Depending on the period chosen, it is possible that the planned order will start as at the
planned start date/time (today +/- offset
)The possible end of an order is determined by the end of the
PP/DS horizon
.