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Authors: José Gomes Requeijo 1 and Adriano Mendonça Souza 2

Affiliations: 1 Faculdade de Ciências e Tecnologia and Universidade Nova de Lisboa, Portugal ; 2 Universidade Federal de Santa Maria, Brazil

Keyword(s): SPC (Statistical Process Control), Control Charts, Process Capability.

Related Ontology Subjects/Areas/Topics: Industrial Engineering ; Methodologies and Technologies ; Operational Research

Abstract: The main objectives of Statistical Process Control (SPC) are monitoring and analyzing the capability of processes. Traditionally, the analysis of the process capability is performed at the end of Phase 1 (preliminary) and periodically during Phase 2 (monitoring) of the SPC, using the indices Cp and Cpk. SPC and capability analysis of production systems with a large diversity of products present difficulties in implementation. In order to meet the needs required by the current production systems, this paper presents methods for both the statistical control and capability analysis of the processes. These methodologies include two situations, when there are sufficient data to estimate the process parameters (mean, variance) and when it does not exist. In the first case, it is suggested the implementation of control charts Z and W and capability indices ZL and ZU. In the second case, when there is a limited amount of data, the authors suggest the implementation of control charts Q and ca pability indices QL and QU. The methodologies are illustrated with two case studies, concluding that they allow streamline the statistical control of the various processes and reduce the downside, in Phase 2 of the SPC, where the capability analysis is made only periodically. (More)

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Paper citation in several formats:
Requeijo, J. and Souza, A. (2013). Process Monitoring in Production Systems with Large Diversity of Products. In Proceedings of the 2nd International Conference on Operations Research and Enterprise Systems - ICORES; ISBN 978-989-8565-40-2; ISSN 2184-4372, SciTePress, pages 123-129. DOI: 10.5220/0004203501230129

@conference{icores13,
author={José Gomes Requeijo. and Adriano Mendon\c{C}a Souza.},
title={Process Monitoring in Production Systems with Large Diversity of Products},
booktitle={Proceedings of the 2nd International Conference on Operations Research and Enterprise Systems - ICORES},
year={2013},
pages={123-129},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004203501230129},
isbn={978-989-8565-40-2},
issn={2184-4372},
}

TY - CONF

JO - Proceedings of the 2nd International Conference on Operations Research and Enterprise Systems - ICORES
TI - Process Monitoring in Production Systems with Large Diversity of Products
SN - 978-989-8565-40-2
IS - 2184-4372
AU - Requeijo, J.
AU - Souza, A.
PY - 2013
SP - 123
EP - 129
DO - 10.5220/0004203501230129
PB - SciTePress