Costs are indicators of the financial and economic health of a company, as they are part of the production chain and are therefore necessary for the manufacture of a product, but when extra costs are included in production profitability is compromised. This paper aims to present the reduction of scrap costs of imported materials, identifying the problems related to the product and its impact on the company. As specific objectives, it aims to understand the problems that occur for the amount of parts disposal; develop a containment and correction action plan; implementation of improvements to the inspection and receiving line. As a methodology, we used a case study in a microwave oven assembly plant, where technical visits were conducted by two leaders responsible for the assembly, inspection and receiving sector, where the collection instruments were performed. For the elaboration of the solutions we used the 5W2H tool and control chart to find the faults in the parts.