ITU‐T's Technical Reports and Specifications 655 through event modeling. Additional capabilities, in terms of processing units, application units, as well as models, might be needed. Secondly, there is a need for fusion processing guidance, so that different sources of observations can be combined together to compensate their own deficiencies and attain the goal more efficiently. Finally, services for information resource publishing and sharing as well as result fusing are also necessary to disseminate information across the concerned agencies. By adopting the integrated management system, each city can make a big step towards the implementation of the smart sustainable cities vision. 1.2 Service framework The users involved in IMSSC are not only municipal departments, but also enterprises and citizens. Municipalities are usually in charge of the daily operation and maintenance of IMSSC which is initiated by them. When emergency events occur, they need to synthesize all the information and make proper decisions to rescue lives and reduce economic losses. Citizens are the users and main beneficiaries of the integrated management for smart sustainable cities. They are able to report problems of daily management, emergencies, as well as receive notifications from the municipal authorities. Enterprises can be viewed from two perspectives: some enterprises can take part and assist the municipality to improve the capacities of the integrated management, others can just act as ordinary citizens to do the work of reporting or notice feedback. The service framework of IMSSC is represented in Figure 2. Figure 2 – Service framework of IMSSC