ABSTRACT
This chapter defined hazards (or threats) in a very broad sense, that is, they can degrade performance of a single infrastructure asset or community (network) of infrastructure assets. However, one of the common attributes of those hazards and the resulting performance or response of the assets to them is that both the hazards as well as the performances change with time. Thus, a single snapshot reaction by the stakeholders (whether this reaction is an assessment, acceptance, treatment, or some combination of the same) might be necessary, but definitely not sufficient. The infrastructure stakeholders have to react dynamically, as needed, in response to hazards. In order to facilitate such dynamism, a system of monitoring may be implemented. This chapter addresses some of the MH attributes of single assets and networks of assets both from a snapshot and time marching viewpoints.
