238 Int. J. Strategic Engineering Asset Management, Vol. 1, No. 3, 2013 Copyright © 2013 Inderscience Enterprises Ltd. Qualitative and quantitative aspects of maintenance performance measurement: a data fusion approach Luis Berges* Department of Design and Manufacturing Engineering, University of Zaragoza, Escuela de Ingeniería y Arquitectura, María Luna, 3 50018 Zaragoza, Spain E-mail: bergesl@unizar.es *Corresponding author Diego Galar and Christer Stenström Division of Operation and Maintenance Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden E-mail: diego.galar@ltu.se E-mail: christer.stenstrom@ltu.se Abstract: The measurement of maintenance performance is often faced with a lack in knowledge about the real function of the maintenance department within organisations, and consequently appropriate targets from the global mission and vision are absence. Measurement metrics are not adapted to real needs, which have a strong human factor; nor is there a roadmap of the amount of data to be collected, their processing or how they are used in decision making. This article proposes a model where qualitative and quantitative methods are combined to complement the advantages of both. Keywords: human factor; maintenance; indicators; performance. Reference to this paper should be made as follows: Berges, L., Galar, D. and Stenström, C. (2013) ‘Qualitative and quantitative aspects of maintenance performance measurement: a data fusion approach’, Int. J. Strategic Engineering Asset Management, Vol. 1, No. 3, pp.238–252. Biographical notes: Luis Berges received his PhD in Industrial Engineering from the Universidad Politécnica de Cataluña and Mechanical Engineer from the Universidad de Zaragoza, ex-Head of Department of Design and Manufacturing Engineering in Zaragoza University, and Professor of Manufacturing Engineering since 1976. He is a member of the Governing Board of Colegio de IngenierosIndustriales de Aragón y La Rioja, and Guest Professor in Luleå University of Technology. He has been Pro-Vice Chancellor of Infrastructure in Universidad de Zaragoza and Director of Transfer Research Office at the same university. As a researcher, he has worked on supply chain management, machining, industrial maintenance, design and engineering teaching. Diego Galar received his MSc in Telecommunications and PhD in Manufacturing from the University of Saragossa. He has been a Professor in several universities including the University of Saragossa or the European