Rapid data modelling techniques in simulation of manufacturingsystems

摘要

Despite widely reported successes in the use of computersimulation in manufacturing, there remain many fundamental issues to beaddressed. One of the major issues in simulation projects is collectionand analysis of input data. This activity encompasses the determinationof the types of data required, identification of available data sources,gathering of data, rationalisation of data and validation. Typically,more than one third of the project time is spent on these tasks. Anyreduction in the time taken for these tasks will enable thepractitioners to build simulation models quickly. This paper presentsthe development of a data reference model which will assistpractitioners to identify, their data requirements rapidly. A detailedentity model forms the core of this system. Limitations of simulationsoftware with respect to data organisation and manipulation arediscussed. Use of alternative data modelling techniques such as entitymodelling and IDEFIX are also discussed in detail. A reference datamodel developed for the batch manufacturing sector is presented with aseries of entity models. Data validation and rationalisation are alsocovered. Use of this reference model is presented with a few simulationapplications