εννοιολογικός σχεδιασμός(A major stage in the design process, through which the project team translates the business requirements into a common language to be shared by users and developers, and describes the feature set and/or usage scenarios that the solution must encompass. Conceptual design is analogous to the rough sketches and scenarios created when designing a house. These are easily understood models jointly created by the customer and the architect)
