**6. Conclusion**

22 Will-be-set-by-IN-TECH

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**Figure 17.** PN model of the production plant.

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> A procedure for using existing data from production management systems to build the Petri-net model was developed. Timed Petri nets with the holding-duration principle of time implementation were used to model basic production activities. For the purposes of scheduling, different heuristic rules can be used within Petri net simulation. The applicability of the proposed approach was illustrated on a practical scheduling problem, where the data about the production facility is given with the formula and recipe. The model achieved with the proposed method was used to determine a schedule for production operations. The proposed method is an effective way to get an adequate model of the production process, which can be used to develop different analyses of the treated system, e.g. schedules.
