Uma aplicação da metodologia projeto e análise de experimentos na construção de matrizes QFD

Abstract

This thesis work presents a synthetic model of application of the Quality Function Deployment (QFD) accomplished in the process of welding in fine foils for the Pulsed MIG/MAG method. This work presents an auxiliary model for the determination of the strategic values (How many) of a main QFD, based on the statistical Design of Experiments (DOE) tool. The work presents a brief vision of the researchers' current tendency in increasing the efficiency of QFD through the application of some techniques and procedures during all the phases of development of the method with the objective of turning it more rigorous and operational. The work also evidences a bibliographical revision on the method QFD and on Design of Experiments (DOE), through its origin, application, advantages and benefits and sequence of steps for its application During the application of the methodology QFD in the range of the process pulsed MIG/MAG, it was used three methods (DOE, the specialists' Opinion, technical References), to accomplish the evaluation of the strategic values (How many) of a main QFD. The results reached by the three methods that were compared among themselves with the objective of finding the best specification for the pulse parameters, so that it can obtain a larger satisfaction of the customer. Finally, the conclusion presents the results regarding to the objectives of the research, as well as a recommendation for future researches.