Product Structure

The purpose of this process is to enter and maintain product structures.

Product structures are mainly used for defining the structure of a service. This information is then used for planning and product costing.

Before you start

The process can be started when the following prerequisites are met:

Note that by using parameters (function key F13 = Parameters) you can regulate whether to permit entering products and materials not previously entered as items.


The result of the process is a product structure containing necessary information for planning, costing and maintenance production.

Follow these steps

The process includes entering items as products, entering bills of material and routings with any varying material, as well as automatically calculating certain information required for product planning.

This diagram describes the activities included in the process:

  1. Register Service

    An item is entered as a service product by registering it in 'Service. Open' (MOS300). The service is used to describe the object being serviced, how often, etc.

    The product structure header can be entered or copied from an existing structure in 'Product Structure. Open' (PDS001). During this process, information is retrieved from the item file. The item information regulates the steps in processing product structure as well as how the product is processed in the production flow.

  2. Based on the information retrieved from the item file, the product is processed in one of the following ways:

    • Enter Material in Bill of Material

      The bill of material contains a listing of the items constituting the service product. It is created by specifying sequence number, component number and quantity included.

      Phantom Material

      Phantom items have item category 2 in the item file (MMS001/G). Phantom items are created as material for a service product in the same way as regular material.

      A phantom item can have its own bill of material. When a work order for a product with a phantom item as material is created, the material included in the phantom item is copied into the product’s own bill of material.

    • Enter Operation in Routing

      Routing contains the operation steps that the product must undergo. It is created by specifying operation number with work center as described in procedure Enter Operation in Routing for Maintenance.

      Phantom Operation

      Phantom items have item category 2 in (MMS001/G). Phantom items are entered as material for a product in the same way as regular material.

      As above for phantom materials, a phantom item can have its own routing. When a work order for a product with a phantom item as material is created, its operations are processed as specified in field Phantom operation method.

      Alternate Routing

      In field Alternate routings in 'Service. Connect to Facility' (MOS301/E) you can specify if alternate routings are to be used. If so, 'Product. Enter Alt Routing Limits' (PDS007) can be called using option 12='Limits alt rout' from (PDS001). Quantity limits can be specified that regulate the routing used during service.

      All alternate routings are entered in 'Alternate Routing. Open' (PDS035).

      When entering operations in 'Product. Connect Materials/Operations' (PDS002), 'Operation. Connect Alternate Routings' (PDS008) can be called via option 17. The routings in which each operation will be included are specified in this program as described in supporting function Alternate Routing.

  3. Product Calculation

    Calculation of planning values for a product is started manually using option 21='Prod calc' in 'Service. Connect to Facility' (MOS301). Whenever the same program is ended by pressing F3, calculations are automatically started.

    The following information regarding the service product is calculated:

    • Total lead time including underlying levels.
    • Lead time on one level.
    • Relative requirements and start days for both materials and operations.
    • Miscellaneous quantity information for materials, operations, etc.
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