Journal of Quality Engineering and Management

Abstract Today, the figures obtained from measurements are used under different headings and much more than in the past. Also, using the statistics obtained from the production process, one can comment on the quality of the products. Therefore, making the right decision in such cases depends on the quality of the measurement. Linearity factors also determine whether a measuring instrument works the same in all of its measurable ranges. The purpose of this study is to develop a fuzzy model to investigate the linearity relationship for a tool whose data are fuzzy triangular and trapezoidal. Finally, the data of automotive industry suppliers were used and the proposed method using coding in software. MATLAB software is solved. Then we compare the results with the classical mode. The results show that the fuzzy mode has more sensitivity and flexibility than the classical mode.