676 ITU‐T's Technical Reports and Specifications resources integration (node meta‐model, observation process meta‐model, observation data meta‐model, event meta‐model, and model meta‐model), fusion processing workflow (fusion of resources and toponym, and maps separately), and service interface specification (observation service, model service, and event service). Taking into consideration the management challenges faced by cities worldwide, this Technical Report describes the advantages of adopting an integrated management system in order to make cities function more efficiently and citizens live more conveniently. This Technical Report provides practical guidance to help urban planners make cities smarter and more sustainable. Adopting the proposed technical solutions, the overall efficiency of information resource collecting and sharing, as well as the effectiveness of information fusion processing will be considerably enhanced, facilitating IMSSC. The next step is to put theory into practice, and to improve it according to the specific problems of every urban environment. To this end, it is essential to acknowledge the importance of turning the requirements presented here into international standards in order to multiply the benefits of this approach across all cities worldwide.