Application of PERT and CPM in production planning
Bahtijar, Naida (2021)
Diplomityö
2021
School of Engineering Science, Kemiantekniikka
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2021090645244
https://urn.fi/URN:NBN:fi-fe2021090645244
Tiivistelmä
Production planning is crucial for the smooth production of products. It helps in proper resource planning and reduces waste and variability in the production process. It allows companies to improve quality and greater competitiveness. This thesis aims to apply the technique of project evaluation and review (PERT) and the critical path method (CPM) in the process of surface protection of metal surfaces - galvanizing process.
The existing planning of the production of a certain product in the company is described. One order from receipt of goods to the final galvanized product was observed and all activities in the process of product production were identified. Both predecessors and successors of each activity were identified, and a three-time estimate was performed by the measuring time for completion of each identified activity. The early start, early finish, late start, and late finish of each activity are determined as well as the slack of the activity. A Gantt chart, as well as a network diagram, was developed. Also, the critical path was identified and the time of completion of the activity on the critical path was calculated, including the estimated time. With the help of all the mentioned things, the probability that the galvanizing of the goods will be completed in a certain period for the ideal case when there is no waiting in the production process as well as for the case when certain waiting is present is calculated.
When the obtained results were considered, it was very useful to notice which activities take the most time in the process. In this case, it was about the control of finished products, but as it is a smaller company that cannot invest in the control systems, the reorganization of the workforce was proposed as an option that can significantly reduce the duration of the process.
The existing planning of the production of a certain product in the company is described. One order from receipt of goods to the final galvanized product was observed and all activities in the process of product production were identified. Both predecessors and successors of each activity were identified, and a three-time estimate was performed by the measuring time for completion of each identified activity. The early start, early finish, late start, and late finish of each activity are determined as well as the slack of the activity. A Gantt chart, as well as a network diagram, was developed. Also, the critical path was identified and the time of completion of the activity on the critical path was calculated, including the estimated time. With the help of all the mentioned things, the probability that the galvanizing of the goods will be completed in a certain period for the ideal case when there is no waiting in the production process as well as for the case when certain waiting is present is calculated.
When the obtained results were considered, it was very useful to notice which activities take the most time in the process. In this case, it was about the control of finished products, but as it is a smaller company that cannot invest in the control systems, the reorganization of the workforce was proposed as an option that can significantly reduce the duration of the process.