Manufacturing >  Batch processes >  Recalculate loads  

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Use this function to recalculate the amount of work to be performed by a resource at a specific production site.

You can recalculate workload from a specific date for one or a range of work centers. Load allocated to the work centers is determined by the routing and the operations that are to be performed. The degree of load is determined by the quantity of the product required. This is defined by the work orders. This function will rebuild (resynchronize) the load buckets for all work orders according to the period breakdown (days, weeks and months) defined in the scheduling parameters.

Access to this process is also available from the Work centers (GESMWS) function.

 You are advised to run this function on a regular basis and especially after any modification to a work center.

Prerequisite

SEEREFERTTO Refer to documentation Implementation

Screen management

The Recalculate loads function displays an initial screen into which you enter your selection (or filtering) criteria. The load buckets will be built from the reference date you provide.

You are advised to run this function on a regular basis and especially after any modification to a work center.

Entry screen

Presentation

For a specified production site, the system selects all work orders that meet the following criteria:

  • The work order start date is later than the defined reference date
  • The work order has at least one operation that uses a work center included in the defined range of work centers.

Entry of a range of work centers is optional. All orders meeting the criteria above are processed, whatever their status (suggested, planned or firm).

The recalculation run automatically deschedules the selected work orders, reinitializes the load table (rebuilds the load buckets and work center capacity), then reschedules the orders.

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Fields

The following fields are present on this tab :

Block number 1

The production site associated with the user is proposed by default. It can be modified by another site authorized for the operator, depending on their authorizations.

  • Reference date (field REFDAT)

Reference date of the processing.

Start - end range

  • Work center (field WSTDEB)

The work center is attached to a work center group. It corresponds to a production resource on which a routing operation is carried out.

This is an entity for which it is requested to plan loads and track production times.

Each work center is associated with an attachment site.
  • field WSTFIN

 
  • field WSTMESS

 

Parameters

  • field FIL31

 
  • Rescheduling (field JALFLG)

Processing of scheduled works orders.

YES/NO flag.

  • Reschedule optimized orders (field OPTFLG)

Box checked: used to include the optimized WOs to the WO selection.

Box not checked: used to exclude the optimized WOs from the WO selection.

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Batch task

This function can be run in batch mode. The standard task FUNMIWL is provided for that purpose.

Action panel

Click OK to rebuild the load buckets for the selected work centers. All existing work orders where an operation in the assigned routing uses the work center are rescheduled if you have selected the rescheduling parameters (Rescheduling checkbox). The reference date is considered as the new start date for any work orders which were in arrears. Operations with forced dates can also be modified (Reschedule optimized orders checkbox).

 All applicable work orders will be rescheduled when you select the OK action. The System log is updated accordingly. If scheduling changes the production start date this might cause an inconsistency between the new work order start date and a version. This might be the version of the product to be released (BOM) or the routing version. The Scheduling flag will remain at status 'Not scheduled'. You must either change the BOM version or the routing version, or reschedule the work order before you can continue. If you choose a new BOM or routing version it must be at status 'Available to use' on the proposed production start date of the work order.
Be careful! The issue with the work order start date will remain in force if you change a version and the new version is inconsistent with the start date. You will not be able to schedule the work order.

Error messages

In addition to the generic error messages, the following messages can appear during the entry :

The end range is prior to the start range

Coherency check of the selection ranges.

Modification in process on another workstation

This message appears at the end of the System log if a lock problem forbids the update.

Rollback following an error in the transaction

Serious access problem in the database.

No work order processed

This message is displayed if the works orders could not be descheduled.

Problem in the table XXXXXXXX

Serious access problem in the database.

Tables used

SEEREFERTTO Refer to documentation Implementation