Abstract
This report gives an overview of the service system design, requirements, specifications and architecture for the main products – Citi-Sense-MOB Citizen Observatory Toolbox (COT), which comprises of a series of applications that support and complement each other. These include the concept for COT, service design concept and methodologies, the COT target groups, and a set of COT (e.g., data, web apps, mobile apps, maps, services, methodologies, etc.).