A simulator for a centralized PACS realization was developed and used with realistic input parameters, which provides reasonable functional outcome. The PACS designers may use it to build a partial or full-scale system and develop operational projections by simulating differing scenarios for PACS design and carefully evaluating whether there are any serious bottlenecks in the system and all the key requirements are met. To analyze a specific PACS configuration, the configuration simulator requires numerous parameters. These parameters are supplied by the designer and by simulation library objects that may be customized. To facilitate a comprehensive analysis of PACS, the simulation parameter sets are stored separately as a scenario, i.e., the designer initiates a session by specifying the simulation scenario number. The user-supplied assumptions, intermediate computed relationships, and program-selected library objects are all associated with this unique scenario number. The results of each simulation may then be compared with alternative scenarios in order to find the best configuration.