Phase One is the entire duration while you are on the diet. Eating 1,500 calories a day.
Phase Two is during the typical plateau periods. Cutting down to 1,000 calories a day will allow for continuous weight loss, even during those periods. Up your calorie intake by 100 every week, and decrease if needed.
Phase Three is for women only. the week in which you are menstrating, cut bread out all together. because menstration increases appetite, snacking on vegetables is a must.
Phase Four is for after you have reached your weight loss goal. This will help you keep it off, for life =]