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Purpose -This paper aims to discuss and bring to the attention of researchers and practitioners the data management issues relating to condition-based maintenance (CBM) optimization. Design/methodology/approach -The common data quality problems encountered in CBM decision analyses are investigated with a view to suggesting methods to resolve these problems. In particular, the approaches for handling missing data in the decision analysis are reviewed. Findings -This paper proposes a data structure for managing the asset-related maintenance data that support CBM decision analysis. It also presents a procedure for data-driven CBM optimization comprising the steps of data preparation, model construction and validation, decision-making, and sensitivity analysis. Practical implications -Analysis of condition monitoring data using the proportional hazards modeling (PHM) approach has been proved to be successful in optimizing CBM decisions relating to motor transmission equipment, power transformers and manufacturing processes. However, on many occasions, asset managers still make sub-optimal decisions because of data quality problems. Thus, mathematical models by themselves do not guarantee that correct decisions will be made if the raw data do not have the required quality. This paper examines the significant issues of data management in CBM decision analysis. In particular, the requirements of data captured from two common condition monitoring techniques -namely vibration monitoring and oil analysis -are discussed. Originality/value -This paper offers advice to asset managers on ways to avoid capturing poor data and the procedure for manipulating imperfect data, so that they can assess equipment conditions and predict failures more accurately. This way, the useful life of physical assets can be extended and the related maintenance costs minimized. It also proposes a research agenda on CBM optimization and associated data management issues.

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