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Business processes in enterprise are changing due to changes in the environment of business systems. These changes need to be implemented with very low latency because it is necessary to maintain competitiveness. Usually it requires a lot of resources (finance, time and people to change the business process components: activities (their contents, executors and consistency) and conditions. It is desirable for the changes to be implemented at the business processes runtime so that they would ensure the dynamism of the business process. This paper presents the dynamic business process definitions proposed by individual authors, examines the dynamism problems, and presents architectural solutions to these problems.