Enterprise integration models: Advantages and challenges of implementation in the context of the COVID-19 pandemic

The relevance of the study of the choice of enterprise integration model is related to the need to solve various problems faced by Ukrainian enterprises in the context of the COVID-19 pandemic, including: reduction in profitability, reduction in investment, increase in the level of costs for ensuring the protection and safety of employees, the transition to environmental and savings production, and others. The purpose of the study is to analyse the existing Ukrainian and foreign business models based on synergy and integration, which allows creating a business structure. The theoretical and methodological basis of the study is general scientific and specific methods used to solve the problem of operation, integration, and development of enterprises in the context of the COVID-19 pandemic. The paper summarises the problems faced by Ukrainian enterprises amid the COVID-19 pandemic. It is proposed as one of the ways out of the crisis of Ukrainian enterprises after the COVID-19 pandemic, the transition to business models based on synergy and integration with the formation of a business structure. For this purpose, Ukrainian and foreign models of creating business structures based on synergy and integration are summarised. The following models developed by Ukrainian researchers are identified: the model of a horizontally integrated business structure; the model of a vertically integrated business structure; the model of a globally integrated business structure; the model of a conglomerate-integrated business structure. The following models developed by foreign researchers are also summarised: a model for quantifying the impact of enterprise integration on the results of its activities; an information model; a model for designing and implementing an integrated enterprise system; a "three-lens" model; a business case model; a model for inter- and intra-organisational cooperation