Production planning assumes two inputs:
Production for customers means that the customer requires certain technical parameters and the product is custom-made, or the product is not in stock and the customer requires a certain delivery date.
Production for warehouse assumes production of a standard product which is distributed to individual customers from the warehouse, to ensure a minimum delivery time.
In both cases, production process of a product goes through the following states:

In order to start product manufacturing, it is necessary to have a filled out product card. The product card contains the technical parameters of the product as well as individual production activities, which need to be done.
