Nowadays business is rapidly changing to fulfil the customers’ needs and to meet the requirements of a changing environment. All those changes of a business have to be implemented in business processes (BP) and their maintaining information systems. Therefore, a necessity for a new approach of dynamic business process (DBP) modelling arises. Moreover, business needs a tool suitable for DBP modelling, execution and simulation. This gap triggered significant research efforts over the past decade and a number of approaches to DBP modelling were proposed. However, a question of implementation of the proposed approaches is left without an answer. Therefore, in the paper we emphasize DBP simulation and existing DBP simulation tools. We review existing DBP modelling approaches, propose a new DBP modelling and simulation approach and develop a prototype for DBP simulation. A DBP simulation experiment was carried out using the developed prototype and obtained results are presented in the paper.