Silva, Catala Racile Ruela, and Wilson Rodrigues de Souza Junior. “Study of the Use of Quality Tools to Analyze the Root Cause of Low Service Performance in a Telecommunication Company”. Brazilian Journal of Production Engineering, vol. 8, no. 2, Mar. 2022, pp. 145-62, https://doi.org/10.47456/bjpe.v8i2.37228.