Business process management (BPM) discipline have been through a severe transformation over the two decades recently. It is influenced by other fields and environment, which became far more dynamic than ever. The velocity of change increases requirements for companies. They need to adapt constantly, encourage flexibility and change common management methods. In BPM domain, there is only little focus on BPM implementation in the companies from a management perspective. Thus, it is crucial that implementation goes hand by hand with company´s strategy that can lead to management transition towards the process-oriented organization. The aim of this paper is to explore the role of agile simulation in BPM lifecycle. Further, the benefits for effective process redesign or improving efficiency of existing business processes are described. The paper focuses on process simulation and what-if analysis in the model environment of Bizagi Modeler in the context of BPM implementation to the organization. The paper includes the literature review on this topic, methodology description, case study containing the creation of business process model of accounts payable, following simulation, what-if analysis, and process optimization. The conclusion contains the summary of results and discussion over the scalability of this approach to other organizations.