For parts which your company produces on a regular basis (production parts or functional BOMs), you can define a default cost calculation in the Parts module. The cost calculation may include:
Surcharges may be a fixed sum or a percentage, and can be calculated on one or more cost components.
A part with a calculation can be visualized as follows:
Not all parts have to include all cost components. For some parts you may include just parts and operations.
Whenever an offer calculation or production order for this part is added to one of the production modules, the default calculation can be copied from the Parts module to the appropriate file. Then, changes can be made to the offer calculation or production order, where necessary, for example to make the calculation customer-specific. These changes do not affect the default calculation in the Parts module.
Contributions
If you are using contributions, you can also add contributions as cost components. Contributions allow you to include costs that cannot be directly allocated to a particular activity or product in your cost prices, and to make the origin of these indirect costs visible. You might want to use contributions, for example, to distribute warehouse costs and administration contributions to the cost prices of orders you have handled.
If contributions are used, the structure of the part calculation is as follows:
General and product-specific calculations
To keep the data in the Parts module manageable, some companies do not add any parts they produce or purchase just once or only occasionally. They use dummy parts for such parts instead. Dummy parts are parts that may refer to product X on one occasion, and to product Y on another. It is only in the production modules that a (customer-specific) calculation is added for these parts.
Other companies deliberately choose to register also one-off products under their own part code and with their own calculation in the Parts module. Those companies are mostly companies in which part traceability is key.