From Smart City sustainable development to resiliency by-design

The Smart City concept for many years has relied on the principals of stainable development and implementing of information and communication technologies (ICT) for city services. With the COVID pandemic the paradigm shifted tremendously and the city governments, as well as scientists have to focus more on resilience strategies. The city managers now should make their decisions in conditions of limited information, unavailability to see and plan future development, maintain "what if" analysis to predict the results.Considering the Smart City as a complex system the new approach and digital platform that combines both sustainable and resilient modes of behavior are presented. This platform allows to perform normally in a sustainable mode and react adaptively when unpredictable events occur in the resilient mode.