Plannability of maintenance in life-cycle decision making for infrastructure

Abstract

Most infrastructure management systems include maintenance planning. Traditionally these maintenance plans are generated based on condition based inspection procedures. In the past decades, infrastructure management organizations like Rijkswaterstaat have moved towards a more tactical maintenance planning, where maintenance and replacement measures are planned at forehand based on known object behavior, and inspections are used to verify and to adjust the maintenance plan based on observations. Practice shows however, that not all maintenance can be planned at forehand. For the long term planning, it is important to have some idea of the plannability of maintenance. This is also relevant for estimation of the expected performance. This paper describes how Rijkswaterstaat has come to estimates of the ratio between regular, plannable periodic maintenance and more incident driven maintenance, and how this can be used in performance management, maintenance planning and end of life evaluations.