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BPS Tool

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Business Process Simulator Tool using jBPM
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  Stuttgart University of applied science in cooperation with camunda GmbH Master Thesis Building an open sourceBusiness Process Simulationtool with JBoss jBPM submitted by: Bernd Rückerbernd.ruecker@camunda.com1st Supervisor: Prof. Dr. Gerhard Wanner2nd Supervisor: Prof. Dr. Jörg Hombergerdate of submission: 1st of February 2008  Abstract Business Process Management (BPM) is a very famous buzzword today. Applied cor-rectly, BPM can lead to better architectures and more flexible software systems. Butwhen new processes are designed or existing processes shall be improved, it is alwayshard to predict the resulting performance.Business Process Simulation (BPS) is of great help in such estimations by usingstatistical methods to gain a better understanding of runtime behavior. But goodBPS tools are rare and costly, making simulation uninteresting for a lot of companies.Because of closed source and closed documentation the tools are seldom useful inresearch, too.The main objective of this master thesis is to create an open source BPS toolon top of JBoss jBPM, an open source business process engine. The simulation cananswer what-if questions concerning resource numbers or input parameters as well ascompare different versions of processes regarding special performance indicators, forexample costs or performance. Statistical input data can be taken from audit log datawhenever possible. Altogether the tool can simulate completely new processes as wellas support continuous improvement.A tutorial with a simple showcase and a real life prototype demonstrates that thesimulation works and how it can be configured and used.  Declaration of Academic Honesty I hereby declare to have written this Master Thesis on my own, having used only thelisted resources and tools.Bernd RückerStuttgart, 1st of February 2008  Contents 1 Introduction 4 1.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.2 Objective and structure of the thesis . . . . . . . . . . . . . . . . . . . 5 2 Business Process Management 7 2.1 Basic Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1.1 BPM and SOA . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1.2 Business processes . . . . . . . . . . . . . . . . . . . . . . . . . 82.1.3 Process engines and the BPM architecture . . . . . . . . . . . . 92.1.4 Definition summary: business process and engine . . . . . . . . 102.1.5 Standards, notations and products . . . . . . . . . . . . . . . . 112.2 Business demands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.2.1 Process Management life-cycle . . . . . . . . . . . . . . . . . . . 132.2.2 Business Process Reengineering (BPR) . . . . . . . . . . . . . . 152.2.3 Key performance indicators for business processes . . . . . . . . 162.3 Business Process Simulation (BPS) from the BPM perspective . . . . . 182.3.1 Vision and position in the life-cycle . . . . . . . . . . . . . . . . 182.3.2 Typical goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192.3.3 Missing attributes in process models . . . . . . . . . . . . . . . 202.3.4 Requirements on business process . . . . . . . . . . . . . . . . . 222.3.5 Process model for simulation projects . . . . . . . . . . . . . . . 22 3 Simulation 25 3.1 Basic Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.2 Discrete Event Simulation (DES) . . . . . . . . . . . . . . . . . . . . . 263.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.2.2 Modeling styles . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.3 Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313.3.1 Random numbers . . . . . . . . . . . . . . . . . . . . . . . . . . 313.3.2 Theoretical Distributions . . . . . . . . . . . . . . . . . . . . . . 323.3.3 Warm-up phases and steady states . . . . . . . . . . . . . . . . 353.3.4 Analyzing simulation results . . . . . . . . . . . . . . . . . . . . 363.4 Business Process Simulation (BPS) in practice . . . . . . . . . . . . . . 383.4.1 Status Quo and challenges . . . . . . . . . . . . . . . . . . . . . 383.4.2 Categories of tools and evaluation criteria . . . . . . . . . . . . 393.4.3 Market overview . . . . . . . . . . . . . . . . . . . . . . . . . . 411
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