Dissertation is a study, which is undertaken for the research purpose and the methodology adopted for this purpose is also applied in a practical manner. This type of study is generally, conducted during the acquisition of a higher degree of doctorate. This is the stage, when an experimental study of a specific topic is undertaken for making the study more effective. This can be better comprehended with the help of an example; like, if a post graduate student, conducting the study on nutrition, applies the study practically, then, he further needs to search for a sample size in such a way, that he observes the diet plan followed by the people comprising the sample size He has to look whether, it is a healthy diet or is a deficient one. This can only be done by drafting a dissertation.