FIGURE 2.1 Facilities life-cycle model. SOURCE: NRC, 2008.

maintenance and repair activities. The service lives of systems and components can be optimized or at least improved by timely and adequate maintenance and repairs. Conversely, when maintenance and repair investments are not made when they are needed, the service lives of systems and components will be shortened (Figure 2.2).


A typical maintenance and repair program includes several types of activities that address different aspects or components of facilities’ systems and have different objectives and outcomes. Maintenance is typically a continuous activity that addresses routine work that is accomplished on a recurring basis and includes some minor repairs. More important and often more expensive repair requirements are typically identified as separate projects. When federal facilities managers identify specific maintenance and repair requirements in funding requests, the funding for maintenance activities is typically presented as one lump sum and individual repair projects above some dollar threshold are identified separately. Projects that are identified as required but not funded make up the bulk of the backlog of deferred maintenance and repair projects.

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