Exercise No. 15: Maintenance
Transfer the following verbal description into an ERM
a) A company produces articles (Mat-#), which are classified in consumables (wear parts) and systems (Ser-#). Systems can have several maintenance contracts (Mtn-#).
b) Customers (Cust-#) can buy maintenance contracts for these systems.
c) If a defective system is sent in by the customer to be repaired, a repair order (Rord-#) is created, and assigned to the serial number. There are repair work centres (RWrk-#) used by repair orders.