Make your dissertation writing better.
Develop your academic skills,
become more confident in what
You should explore the various possibilities of this task. For instance some people don't write their thesis they record it. That is to say they have their notes in front of them and a plan and from those notes and the plan they speak their thesis into a recording device. Then they can either type up the dictation themselves or get a professional to do it for them. But either way this will expedite the creation of your academic masterpiece.
Whichever method you use to notate your work, you will certainly need to edit it. In fact some people argue that writing is important but re-writing is more so. You can get a professional to give advice on this and certainly working closely with your supervisor will be of benefit as well. This is an essential task and it's really important that you must understand the expertise and skills required to edit well.