Risk Analysis in Maintenance

This chapter discusses the use of risk analysis to support decision making on maintenance activities. In recent years there has been a growing interest in the use of risk analysis and risk based (informed) approaches for guiding decisions on maintenance, see, e.g., Vatn et al. (1996), Clarotti et al. (1997), Dekker (1996) and Cepin (2002), and this topic has also been given much attention in industry see for example van Manen et. al. (1997), Knoll et al. (1996), Perryman et al. (1995) and Podofillini et al. (2006). This chapter provides a critical review of some of the key building blocks of the theories and methods developed. We also discuss some critical factors for ensuring a successful use of risk analysis for maintenance applications. The issues discussed include: Risk descriptions and categorisations Uncertainty assessments Risk acceptance and risk informed decision making Selection of appropriate methods and tools An example is presented of a detailed risk analysis, showing the effect of maintenance efforts on risk.