Auswirkungen der Änderungen in der Produktionsplanung auf den Vormaterialbestand

Abstract

This paper deals with the effects of changes in production planning on raw material stocks. The starting point is the observation that high raw material stocks cause high inventory costs for companies on the one hand, but on the other hand, raw material stocks are necessary to ensure the security of supply for production. In practice, it has been shown that frequent changes in production planning lead to fluctuating material requirements, uncertainties in planning activities and, as a result, raw material inventories that incur high inventory costs. The specific problem arose during an internship at Miba Gleitlager GmbH, where high raw material inventories and frequent changes in production planning led to organisational challenges and high inventory costs. The central question of this thesis is therefore: what measures can reduce the impact of changes in production planning on raw material inventory? To answer this question, the fundamentals of MRP II production planning were reviewed, the factors influencing production planning and raw material inventory were examined, the causes of changes in production planning were identified, and the effects of production planning changes on raw material inventory were investigated. To answer this question, the fundamentals of MRP II production planning were reviewed, the factors influencing production planning and raw material inventory were examined, the causes of changes in production planning were identified, and the effects of production planning changes on raw material inventory were investigated. The results show that the causes of changes in production planning can be traced back to low planning stability, insufficient data quality, uncertainties in planning, and customer changes. Changes in production planning have a direct impact on raw material inventory, as production planning determines the timing of procurement and the order quantity. Changes in production planning result in stock shortages or excess stock, and raw material inventory finds itself in a conflict of objectives between reducing inventory costs and avoiding shortage costs. These effects of production planning changes on raw material inventory can be reduced primarily through measures in production planning, including dealing with planning uncertainty, introducing a frozen zone, and training employees to improve data quality. With regard to raw material inventory, it is recommended that safety stock not be increased reactively in the event of fluctuations, but instead that a clear inventory strategy be defined.

Date of Award	2025
Original language	German (Austria)
Supervisor	Wolfgang Ortner (Supervisor)