Business concept or idea
In principle, business ideas, concepts or methods can not be registered as a patent, trademark or design.
You can not obtain protection for something that is only at the idea stage. However you may be able to protect certain parts of a concept or method.
Business method: how to operate an aspect of an economic enterprise.
Business idea: the general and basic idea behind the business
Business concept: individual elements that are put together into one whole - an idea that is the basis for founding or transforming a business. Examples may be franchise concepts or TV formats.