What we need to know in order to use this model is how and why it works. We like consistency in our lives. We appreciate clarity and simplicity. For evidence we need look no further than our popular media. Obviously, the news crew has some flexibility with this model.
Writers have the same flexibility.
The above essay example assumes a simple thesis with 3 main points of support. Your essay may have 6 points of support or perhaps only 2. We simply add or delete body paragraphs from the model. A good essay contains clear language and structure, as discussed above. It is also easy to follow, easy to read, and easy to agree with.