The paper deals with the topic of the importance of production management, specifically one of its important factors - planning. Quality planning in production management enables companies to optimize resources and improve productivity, which is very important for the sustainability and competitiveness of companies in today's market. In the planning process, there are numerous challenges related to process activities, coordination and adaptation to changing conditions. For this reason, various methods have been developed that enable a more detailed monitoring of the planning process through the identification of key activities and the definition of their interconnections, which can reduce difficulties during production, better predict the required time and optimally use labor resources. Network planning assumes that each activity during the production process should be performed in a certain sequence in order to optimize production. When applying the network planning technique, there are several stages of process analysis - from organization, time and cost analysis to optimal schedule analysis. Network plans are presented with network diagrams. At the end of the work, a network diagram is presented on the example of an air conditioning system project. The diagram is shown using the program POM QM V5.2. The example shows how the use of information technology greatly facilitates visualization, sequence, monitoring and quick reaction in the production process