Controle estatístico do processo de embalagens: Estudo de capabilidade de oscilação de gramatura

Abstract

Companies from various sectors are increasingly optimizing their production processes in order to remain competitive in the market, and the means used to achieve this evolution lies in the use of Statistical Quality Control (SQC) tools. The packaging industry can be included in this scenario, as it covers a significant portion of the market and requires constant improvements. This study presents a case where an exceeding of the agreed variation limits with the customer for packaging production was identified due to an increase in their weight, resulting in the need to notify the customer and the potential rejection of the batch. Capability studies of packaging production were conducted to assess compliance with customer demands. Additionally, methods for adapting the production process to keep the final product within the parameters established in the agreement were analyzed. The results indicate a 22.93% probability of deviations in new productions, of which 3.12% exceed the upper specification limit, while the remainder represents the probability of deviations below the lower specification limit. Despite causing a significant deviation, the weight exceeding the limit identified as the root cause in this study was not identified as the primary issue, as production showed a lack of centering with a representative asymmetrical distribution of 19.81% below the lower specification limit.