ENHANCEMENT OF VIABILITY AS A KEY IDEA AND REQUIREMENT OF SPATIAL REFORM AND DEVELOPMENT OF LVIV

The war in Ukraine brought the issue of sustainability to the top priority. An understanding of the phenomenon of vitality (vitality) in urbanized systems, substantiation at the methodological level of methods and algorithmsfor its increase in dynamic, aggressive and unstable conditions of today has been carried out. The vitality of cities is interpreted by the authors as the quality of the system, which allows it to withstand changes in environmental parameters other than calculated ones; the ability of the system to cope with aggressive processes in an environment with minimal damage or loss of functionality; to preserve the living conditions and activities of residents in a situation of unpredictable and spontaneous changes; respond flexibly to influences and skillfully use them for selfimprovement.To substantiate the structural model of the city’s resilience, a model of multidimensional urban planning space was used, which includes dimensions “man – functions – conditions – geometry – time”, revealing the essence of the city as a system. The characteristics, analysis and evaluation of the sustainability of the space of Lviv are given, principles and proposals for its improvement are formulated.