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Function documentationResource Execution Constraints (REC) Using Radio Frequency

 

This function allows you to control the number of permitted work resources in defined areas of your warehouse. You define these areas by assigned an REC storage group to your storage bins in master data.

The individual REC storage groups can correspond to an aisle, storage section, storage type, or another area in your warehouse. Define the maximum number of permitted work resources for these REC storage groups in such a way that the resources can perform your work without disruption.

The resource execution constraint consists of a group of different resource types, each having a maximum number of work resources. You identify the group uniquely using an ID. You can assign the same ID to different REC storage groups, and define whether:

  • Only 1 resource type is allowed to be kept in the REC storage group at a time (parameter OR).

  • Multiple different resource types are allowed to be kept in the REC storage group at a time, for example fork lift and warehouse worker. For each resource type, the maximum defined number of work resources in the REC storage group is allowed (parameter AND).

Example Example

Resource types RT01 and RT02 are assigned to resource execution constraint A1, with a maximum number of 2 and 3 respectively. REC storage group GAN is assigned to constraint A1 with the parameter "AND". This means that a maximum of 3 resources of type RT02 and 2 resources of type RT01 can work in A1 at the same time.

End of the example.

The REC control is based on calculated times. Each time a resource enters the REC storage group, the system calculates the estimated exit time when it leaves the area. This time includes the following:

  • Move time for moving the resource from the current position to the entry point of the REC storage group

  • Working time in the REC storage group

  • Exit time of the resource from when it leaves the location of the last completed warehouse task to the exit point of the REC storage group

When a resource wants to enter the REC storage group, the system compares the estimated exit times of the resources working in this area with the entry time of the resource. The system calculates the times, compares the calculated values with the number of permitted resources, and allows or denies the resource access to the REC storage group. If a warning is issued, the warehouse worker can enter the area, but he or she does so at his or her own risk.

The system calculates optimal routes for the resources, based on the travel distance calculation. The actual times may deviate from the optimal times.

For more information about calculating resource working times, see Travel Distance Calculation.

Prerequisites

  1. You have defined resource types and a speed for these types.

    In Customizing for Extended Warehouse Management, choose Start of the navigation path Cross-Process Settings Next navigation step Resource Management Next navigation step Define Resource Types. End of the navigation path

  2. You have defined resources, and assigned these to resource types.

    On the SAP Easy Access screen, choose Start of the navigation path Extended Warehouse Management Next navigation step Master Data Next navigation step Resource Management Next navigation step Maintain Resource. End of the navigation path

  3. Since the system calculates the working times using the travel distance calculation, you need to have defined a node for each activity. You need to have assigned these nodes to aisles.

    On the SAP Easy Access screen, choose Start of the navigation path Extended Warehouse Management Next navigation step Settings Next navigation step Travel Distance Calculation Next navigation step Settings for the Travel Distance Calculation End of the navigation path.

  4. You have defined resource execution constraints (RECs).

    In Customizing for Extended Warehouse Management, choose Start of the navigation path Cross-Process Settings Next navigation step Resource Management Next navigation step Control Data Next navigation step Define Resource Execution Constraints (REC). End of the navigation path

  5. You have assigned an REC storage group to the storage bins.

    On the SAP Easy Access screen, choose Start of the navigation path Extended Warehouse Management Next navigation step Master Data Next navigation step Storage Bin Next navigation step Create Storage Bin/Change Storage Bin/Mass Change to Storage Bins End of the navigation path.

  6. The function works using the average confirmation time for warehouse tasks.

    If you have activated Labor Management in your EWM system, the system uses the engineered labor standard values.

    If you are not using Labor Management, you must define the bin access type for the REC storage group, in the master data. You must also define the extract time determination for storage bins.

    In Customizing for Extended Warehouse Management, choose Start of the navigation path Cross-Process Settings Next navigation step Warehouse Task Next navigation step Define Extract Time Determination. End of the navigation path