Design. Analyze. Optimize.

Spare Part Consumption Modelling

When defining the spare part consumption of a certain equipment entity it is possible to take advantage of an ELMAS model created of this entity. The root cause events (e.g. 'Pump X fails') in the ELMAS model can be inputted with a spare part consumption information that defines which spare parts are needed and with what probability, if the event is fulfilled. Normally the spare part need is defined to the root cause events of the model which makes it easier to define what spare parts are needed when the event comes true.

Operations model:

  1. Creating an ELMAS model of the subsystem e.g. for a RAM analysis
  2. Defining the spare part needs for the root cause events in the ELMAS model
  3. Recognizing the critical events in the model with ELMAS software (event criticality defines the needed spare part criticalities)
  4. Simulating spare part consumption with ELMAS software
  5. Transferring the simulated consumption data to StockOptim software and inputting the rest of the required information for the optimization (i.e. item delivery time, purchase price and other common cost factors)
  6. Performing a StockOptim optimization for the item so that the storage requirement for the service rate equals the criticality of the event in the ELMAS model
  7. Going through the optimization results and checking unclear results with a more accurate simulation
  8. Taking into use the optimized storage strategies.

When performing the item optimization based on the ELMAS model it is important to check if the items consumed by the model have consumption also in some other locations excluded from the model. The consumption coming from these locations has to be added to StockOptim software so that the item storage strategy can be optimized with the true consumption data.