Development of a model for determining the alignment of it-services of the information system with the end-user requirements

Abstract

Issues of determining an alignment of the IT-services of the information system of an enterprise with the functional end-user requirements are considered. Such alignment is established for the information systems with service-oriented architecture. A description of relationship between a set of IT-services and the set of requirements is considered to be extremely difficult. That is why in order to solve this problem, it is proposed to use a categorical apparatus. In the work, models of the structure of IT-services and the structure of end-user requirements were developed. We defined structured sets and representations, which form a mathematical model of the structure of IT-services of an enterprise information system. Functionality of the morphisms, describing relationships between objects in a category of IT-services, was confirmed by commutative diagrams. To determine a category of the end-user requirements, the sets of objects and corresponding morphisms were assigned. The objects of end-user requirements include: a set of requirements from an enterprise, a set of requirements of subdivisions, a set of personal requirements by particular employees of the enterprise. The categories of IT-services and end-user requirements are described in the form of structured sets and morphisms. Relationships between the introduced categories are described by the appropriate functor. Functionality of relationship between a category of IT-services and the category of end-user requirements is explained by the alignment of selection of IT-services with the implementation of a specific list of functional requirements. Implementation of such alignment is carried out using the introduced morphisms, which can be realized through visual models in the form of UML diagrams. In summary, we obtained a categorical model for determining the alignment of IT-services of the information system with the end-user requirements.