6.28. Complexity may also be used as a guide to inform decisions regarding the level of effort to be applied in assessing or reviewing a particular disposal facility, component of the disposal system, and process or assessment model. Complex active systems or complex components are generally not necessary for disposal facilities. A complex design for a disposal facility might suggest a need for a correspondingly complex representation of the design in safety assessment. Therefore, for many disposal systems, design simplicity is viewed as a virtue (e.g. because it may be easier to develop a convincing safety case for a simple system). Rather than developing a complex safety assessment, the operator should first consider whether complexities in the safety assessment can be eliminated by adopting a simpler facility design.