This heading includes only whatever someone (who has not previously addressed the problem) needs to know in order to understand why you have just made the experiments, which are then later described. Here, finally, two kinds of reasons are to be elaborated on by you:
(1) There must be, at the point when you are editing, a knowledge gap, or at least some contradictory findings. (2) This point must be important (at least for the research, and even better – for mankind): The closing of the gaps in the knowledge / awareness of the contradictions must be promising new opportunities (research, medical therapy or even marketing).
Anything that you can think of to substantiate either of these reasons, and that can be cited to represent it – you must put in detail and have elaborated on; the whole chapter ends (and culminates) then your task, which appears as a result of the written words, and the reader – as the unwilling inevitably present party.
If a reviewer concludes from reading the introduction of your dissertation proposal that you should investigate further, you should prefer a different question in this area (or even maybe the whole field is really not worth), then you have done something wrong http://www.a-mentor.co.uk/services/research-writing/dissertation-proposal/.
Also always remember that your readers develop an opinion about whether the thesis is interesting or not at the very beginning . Begin therefore with posting your ideas, for example, with an original working hypothesis that you confirm later or at least refute.
Rule Nr.4b (Materials and Methods)
This chapter will teach you two things, (1) exactly how expensive / difficult / smart / your experiments should be performed, and (2) that you have mastered the methods and can describe that you can, that your subject area can be developed by another doctoral (if he is really as skilled as you) and is to be performed solely on the basis of your description as well. The latter is a tall order, which is in practice usually reduced as follows:
In your description it must be clearly stated what methods you used and in what order (it is going to be advantageous if it is all justified about the choice of the individual methods and the experimental steps in terms of the task) when using several methods or partial steps which usually is attached as an overview chart.