Any scenario can be customized to fit the needs of your facility/agency/organization, depending on your knowledge of your local community. All exercises should be based on threats and hazards identified in your local risk assessment. If a suggested scenario is not applicable to your jurisdiction, or not conceived as a likely threat, it is recommended that you alter the scenario or create one that is more applicable.
If you are in a small community or rural jurisdiction, you may want to alter the scale of the incident. Instead of a large-scale pandemic, bioterror incident, or multi-site coordinated terrorist attack, you could replace it with a small number of cases of an emerging infectious disease, or an isolated attack in one area. You can scale the scenario up or down to fit your exercise capability.
If you are in a suburban community, you should consider the incorporation of jurisdictional lines into your scenario. Consider scenarios that may affect neighboring jurisdictions and overlap between your jurisdictional lines. How do commuters affect the scenario? Transportation corridors? Tourists?
In an urban setting, consider the geography and infrastructure involved in the scenario. Consider the "domino effect" that a seemingly isolated incident can have on multiple systems, transportation corridors, events, etc. Scale the scenario accordingly and include details on how the scenario is affecting other areas of your jurisdiction.