Sigma Level Verification of a Thermoplastic Industry with the Support of DMAIC MethodAntonio Carlos de Queiroz Santos, Danilo Praxedes Moura de Amorim, Suelyn Fabiana Aciole Morais, Hélio Cavalcanti Albuquerque Neto and Isabel Lausanne FontgallandMATEC Web of Conferences, 35 (2015) 01002DOI: https://doi.org/10.1051/matecconf/20153501002