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This paper focuses on the use of the Ishikawa diagram to analyze the cause of the high loss rate in the plastic injection process in the manufacture of a key part in an industry in Rio de Janeiro, which is part of the main structure. product sold by the company. With a loss of around 50.3% of the pieces produced using the raw material and totally specific to the item in question and the most expensive among the polymers used, and without the possibility of recycling the waste material, the strategic direction of the organization considered suspend sales of the main product for fear of customers placing orders and the company is unable to meet the required demand due to the non-solution of the problem caused in the manufacture of the part. The standstill of sales of final products that use the item analyzed would affect the company's monthly revenues by approximately 32.16% (R $ 183,116.77), a total equivalent to the average from January to November 2018. In order to solve the problem of process losses, production bottleneck, high raw material acquisition costs and possible shortages in meeting customer needs, the use of the Ishikawa diagram to analyze the observed problem and to apply plausible solutions to the problem was justified. resolution, which solutions were already implemented with potential cost savings of R $ 88,414.26 and a significant increase in production over a period of one year. In 2 days of operation it was possible to reach the amount that was reached in 6 days with losses below 5% and fully reusable in other products.

UTILIZAÇÃO DO DIAGRAMA DE ISHIKAWA COMO FERRAMENTA DE ANÁLISE DA CAUSA RAIZ DO ALTO ÍNDICE DE PERDAS EM UMA INDÚSTRIA DE PLÁSTICOS NO RIO DE JANEIRO