Integration Of Simulation System Research Articles

Computer aided production planning - SWZ system of order verification

SWZ (System of order verification) is a computer implementation of the methodology that support fast decision making on the acceptability of a production order, which allows to determine not the best possible solution, but admissible solution that is possible to find in an acceptable time (feasible solution) and acceptable due to the existing constraints. The methodology uses the propagation of constraints techniques and reduced to test a sequence of arbitrarily selected conditions. Fulfilment of all the conditions (the conjunction) provides the ability to perform production orders. In the paper examples of the application of SWZ system comprising the steps of planning and control is presented. The obtained results allowing the determination of acceptable production flow in the system - determination of the manufacturing system parameters those that ensure execution of orders in time under the resource constraints. SWZ also allows to generate the dispatching rules as a sequence of processing operations for each production resource, performed periodically during the production flow in the system. Furthermore the example of SWZ and simulation system integration is shown. SWZ has been enhanced with a module generating files containing the script code of the system model using the internal language of simulation and visualization system.

Practical Example of the Integration of Planning and Simulation Systems Using the RapidSim Software

In the paper practical implementation of the methodology of production planning systems with discrete event simulation (DES) systems integration has been presented. The required definitions of data structures and functions transformation in the form of XSLT documents have been presented. The functional algorithm and RapidSim software made on its basis, which is practical implementation of the integration methodology was developed. Developed software and parameterising documents have been used for the integration methodology verification. RapidSim system was made in VisualBasic development environment, and by the fact that Data Transformation XSLT documents can be independently developed, the software can be used for any integrated systems. During the verification phase of the implemented methodology, the software has been used for the practical implementation of Production Order Verification System (SWZ) for multi-assortment, concurrent production planning and Enterprise Dynamics simulation system integration.