Towards Value-Based Asset Maintenance
The management of assets such as equipment and infrastructure can be a challenging task, and optimizing their usage is critical. Consequently, the importance of the maintenance function has increased because of its role in ensuring and improving asset performance and safety. Over the past few decades, there has been increasing interest in the area of maintenance modelling and optimization. More recently, the focus of research has been to take a whole-life perspective of the asset, and optimise maintenance decisions across the complete asset lifecycle. Most of the current research in this area takes cost (e.g., Life Cycle Cost) as the primary objective for optimisation (minimisation). These approaches do not effectively represent the role of maintenance because they do not consider the performance improvement organisations can expect to gain by proper maintenance – and this, we feel is a key limitation. In order to use maintenance as a “value driver” for the organisation, one must move away from cost-based thinking to value-based thinking. An important step in this direction is to consider net present value/utility of the decisions as the objective function, which will be discussed in detail in this paper. Nevertheless, the key parameters that are involved in a NPV or MVA based optimisation are still related to cost or “money” in general. By doing so, we would miss a number of other value-drivers that would be affected by maintenance. Examples of these are quality of products/service, customer satisfaction, environmental impact, etc. In this paper, we examine the possible elements of value provided by assets to the organisation owning those assets, and discuss how these value-drivers are affected by maintenance decisions. In this direction, we propose a measure - Value of Ownership (VOO) - to assess the value of maintenance and performance of maintenance decisions throughout an assets lifecycle. This measure will consider different value-drivers of a decision and makes it possible to consider the impact of maintenance decisions on a broader value space.
KeywordsMaintenance Action Asset Management Mean Time Between Failure Maintenance Decision Demand Profile
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