As a consultant at McKinsey & Company and working with business correspondence, Barbara Minto came to the conclusion that text built on the pyramid principle is best perceived. The relationships between statements in such a document are limited to three logical directions: up, down and sideways. The pyramid principle became the standard of McKinsey, and then of a number of other companies. The task of any document is to convey one single, main idea. Start with the main thing, and then move down and to the sides. The pyramid structure will help you formulate your ideas, establish clear relationships between them, and bring your reasoning to its logical conclusion. All this will make the document easy to understand and will help you convey your ideas to the reader. Using the principles of the pyramid, you will learn to write clear, concise documents in a minimum of time.