Large organizations are perpetually looking for created value and competitiveness and Information Technologies (IT) are a real catalyst if well-exploited. However, over time, changes occur and often lead to inconsistencies and misalignment between the business and its underlying information system (IS), becoming a great handicap for the durability and the responsiveness of the business. One of the key approaches to tackle these inconsistencies and keep the IS profitable for the organizations is Business-IT Alignment (BITA) which means making sure that business orientations, business capabilities and IT-based software system are correctly aligned and coherent. We focus on the operational BITA, namely the coherence of business services (functions) and their underlying software applications. My PhD project aims to propose a model-based semi-automated approach mainly to achieve and sustain the alignment between Business and IT artefacts. We aim to lean on Enterprise Architecture frameworks since they lean on standards (Togaf, Archimate) and to extend them. We propose in this paper a short overview of the existing approaches, a bunch of research questions related to the topic, in addition to the basis of the solution we are targeting.