The most important elements of sucessfull interior design are the idea, funkction, harmony, and meeting custumer‘s expectations. You should be able to feel pleasant emotional atmosphere and cohesive whole in a good interior. Interior must serve the people and foster aesthetic harmony, that is what constitutes the unique value of the design.
Every object and customer are unique so the course of the project and the presentation may vary. It depends on the specifications of the object, the scale of the project, the terms and requests of the customer. Project scale, cost, course and presentation are subject to agreement.