Monitoring the mean of univariate process by attributes and variables

• Grant number: 17/26535-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2018
• End date: May 31, 2019
• Field of knowledge: Engineering - Production Engineering
• Principal Investigator: Marcela Aparecida Guerreiro Machado de Freitas
• Grantee: Filipe de Paula Oliveira
• Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil

Abstract

Control charts by variables have been widely used for monitoring univariate processes. Recent works have shown that the strategy of combining inspection by attributes and variables data (the MIX strategy) is economically more advantageous than variable inspection only. Moreover, a control chart based on the MIX strategy may show performance similar to the control chart based only on inspection by variables. In this project we intend to investigate the performance of the control chart based on the MIX strategy for monitoring the mean of univariate processes. The properties of the proposed chart are obtained by simulation. The Fortran language will be used to create the computational codes. The results obtained by simulation will be used to validate the theoretical results obtained by the research group which the supervisor of this project is part, as well as to check the results obtained by Aslam et al. (2015) who seem to have a misconception. (AU)