The article considers the methodology of developing a top-level business processes reference model for the construction of architectural solutions in hospitality industry. In this paper, the authors identify basic stages in the development of business architecture for hospitality enterprises and define the main differences between business functions and business processes. Classification of basic, managing and supporting business processes is also given. As a result of the research, the reference business processes model of top-level digitalization is developed. Development of a top-level business processes reference model allows to construct an optimal architectural solution that will create new opportunities for hospitality industry enterprises in the era of digitalization, when the increase of manageability, monitoring of performance indicators and security control will allow to move to predictive models and proactive (program-target) management of accommodation facilities.