Förbättringsmöjligheter i en testutrustning för transmissioner inom anläggningsmaskinsindustrin

Sammanfattning: All manufacturing requires some form of quality control to be able to ensure that a product will meet the customers requirements. Volvo Construction Equipment AB has a TDI station, Test Delivery Inspection, for transmissions. They experience a lack of insight and knowledge of the tests that has been done and therefore the purpose of this project is to investigate and improve Volvo CE's test equipment for transmissions and its reliability. The aim is to provide improvement proposals to the organization as well as a plan for the implementation, follow-up and control of the process. The study is an improvement project and therefore the methodology Six Sigma and parts of the work process DMAIC are used to accomplish the study. The method is adapted for improvement projects and is primarily used by larger producing companies. For data collection, both quantitative and qualitative methods are used. These methods are; the use of existing data from the organization, brainstorming and two different MSA tests aimed at examining the machine and the human's influence on the process. Several quality tools were helpful when analyzing the results and the two factors that has the biggest impact on the test equipment's results is the impact from the human and the test equipment itself such as the variation of the test equipment. An initial approach to reducing the impact of these factors and thereby making the test equipment more reliable is to make sure that all routines are followed and ensure that the method for extracting data from the test equipment is right. The conclusions are that the tolerance limits needs to be checked again just because they are based on personal experience and the process can be controlled with statistical process control. To follow up on the results, the same tests can be performed repeatedly and compared with this project. The project can be described as a standardized working method for similar improvement projects and can also be applied to other processes.