The workflow represents the transferring of data, documents and tasks during the work. Often it is not easy to trace the path of a concrete task or a document. To make easier the study and analysis or working processes and for presenting them in a simple visual manner workflow diagrams are used. With the help of such diagram it is possible to see the path of the task in a workflow, the person who is responsible for its execution on each stage, which documents the task is accompanied by and which resources it needs. Knowing this it is possible to optimize the workflow and to discover weak points in it. Workflow diagram is a sort of flowcharts.