Royal Swedish Navy vessels must be able to operate under varying threat scenarios, where the probability of surviving a threat depends on the ship system's vulnerability and resilience. There is a need to optimize the ships' resilience in terms of both weight and economics. This includes being able to make comparisons between measures that increase durability and measures that improve damage control. Effectiveness is achieved through a combination of technical systems and manual efforts. At present, there are no readily available models for assessing the value of manual efforts. This report presents a number of theoretical frameworks and models that have the potential to be used as a basis for developing a tailored methodology for assessment of the human contribution during damage control. The frameworks can be used to support reasoning about the crew's competence and the modelling can be used to illustrate time-critical activities, spatial aspects and C2. The concept of system safety provides an approach to addressing the balance between technology and human in-the-loop. The theoretical approaches are considered suitable as starting points for further development of a bespoke valuation methodology. A complete analysis of damage control, however, presupposes the production of the necessary data with regard to the crew's as well as the ship's characteristics. An important aspect is that the methodology takes into account both the context of external battles and the mutual dependencies that exist between internal and external battles.