The goal of the Doctoral dissertation work – to study the financial viability within the sustainable development context and basing on the principles of a harmonious distribution of the structure elements of sustainability, to elaborate the economic tools for managing financial viability in order to provide companies’ sustainable development.The novelty of the Doctoral dissertation research work: performing the analysis of the essence of financial viability and its connection with the definitions of other concepts, the concept of “financial viability” has been specified; the whole set of indicators for analyzing financial viability of the non-finance sector companies at the macro level which is included in the methodology offered by the International Monetary Fund (IMF) has been used at the level of the industry sector and micro level within the framework of the given research work for investigating a company’s financial viability in the context of sustainable development; the marginal values of the indicators of financial viability and the levels of their adequacy have been determined, as well as the methods for their identification have been elaborated; the structural model for sustainable development in which the degrees of significance of the elements providing financial viability are defined based on the principles of harmony has been elaborated; the model for assessment of the contribution of financial viability to sustainable development has been elaborated, and also the assessment of the level of the theoretical and real contribution of the service companies in Latvia has been done; the complex approach to the analysis of insolvency and bankruptcy forecast as an anti-recession tool which is based on the principles of rating of the criteria has been worked out; the complex factor analysis of financial viability of the service companies in Latvia has been performed; the principles of managing financial viability on the basis of their elasticity in accordance with the factors which influence them have been suggested. The Doctoral dissertation is written in Latvian, and consists of an introduction, 6 parts, conclusions and proposals, 32 tables, 22 figures, 3 annexes, and the total page count is 190. The Bibliography contains 172 sources of references.