Most business or scientific concepts come in a lot of flavors and variations. The objectively correct way to explain the concept to someone is to sketch the overall framework of possible permutations, then start filling them out one by one. This is what academic literature does, or a manual with a comprehensive index section.
To a cold audience with no understanding what so ever on the subject, starting with a layout of all the options is either frightening or confusing (probably both). Instead pick one model/option (don't let the audience choose), and take here through the whole thing. Then - and only if necessary - add more variations and options.
In most cases, the audience is not interested in a comprehensive representation of whatever field you are working in, she is pondering whether to buy your product or invest in your company. University-style lectures will not get you there.