Invoicing at delivery Workflow for complete production

313 Figure 21.20: Definition of a workcenter A workcenter must have a name and a code. You then assign a type: machine, human resource, tool, and a description of operating hours or functionality. The figure Definition of a workcenter represents the hours from Monday to Friday, from 08:00 to 18:00 with a break of an hour from 12:00. You should show a description of the workcenter and its operations. Once the database is encoded you should enter data about the production capacity of the workcenter. Depending on whether you have a machine or a person, a workcenter will be defined in cycles or hours. If it represents a set of machines and people you can use both cycles and hours at the same time. Note: A Cycle A cycle corresponds to the time required to carry out an assembly operation. The user is free to determine which is the reference operation for a given workcenter. It must be represented by the cost and elapsed time of manufacture. For example, for a printing workcenter, a cycle will be the printing of 1 page or of 1000 pages depending on the printer. To define the capacity properly it is necessary to know, for each workcenter, what will be the reference operation which determines the cycle. You can then define the data relative to the capacity. Capacity per Cycle CA : determine the number of operations that can be done in parallel during a cycle. Generally the number defines the number of identical machines or people defined by the workcenter. Time for 1 cycle hour TC : give the duration in hour for that or the operations defined by a cycle. Time before production TS : give the wait in hours to initialise production operations. Generally this represents the machine setup time. Time after production TN : give the delay in hours after the end of a production operation. Generally this represents the cleaning time necessary after an operation. Efficiency factor ET : is a factor that is applied to the three times above to determine the real production time. This factor enables you to readjust the different times progressively and as a measure of machine utilization. You can not readjust the other times because generally they are taken from the machine’s data sheet. The total time for carrying out X operations is then given by the following formula: C CA TC + TS + TN ET. In this formula the result of the division is rounded upwards. Then if the capacity per cycle is 6 it takes 3 cycles to realize 15 operations. Tip: Multi-level routing It is possible to define routing on several levels to support multi-level bills of materials. You can select the routing on each level of a bill of materials. The levels are then linked to hierarchies of bills of materials. 314 The Hour Account and Cycle Account lets you define the links to analytical account to report the costs of the workcenter operations. If you leave the different fields empty Open ERP will nott have any effect on the analytic accounts.

21.9.3 Routing

Routings define the assembly operations to be done in workcenters for manufacturing a certain product. They are usually attached to bills of materials which will define the assembly of products required for manufacture or for finished products. A routing can be defined directly in a bill of materials or through the menu Manufacturing → Configuration → Master Bill of Materials → Routings. A routing has a name, a code and a description. Later in this chapter you will see that a routing can also be associated with a stock location. That enable you to indicate where assembly takes place. Figure 21.21: Definition of a routing with three operations Note: Subcontracting assembly You will see further on in this chapter that it is possible to link a routing and a stock location for the customer or the supplier. You do this after you have subcontracted the assembly of a product to a supplier, for example. In the routing you must show the list of operations that must be done. Each operation must be done at a workcenter and possess a number of hours andor cycles be done.

21.9.4 Impact on the production order

The routings are then attached to the bills of materials which are then also used to generate product order. On a production order you will find assembly operations for manufacture on the Work Orders tab.