builds on those aspects of your study that are of most interest to you at any particular time. Change the tense from future tense to past tense and then make any additions or changes so that the methodology section truly reflects what you did. Or, you had tripled the size of your sample since the agency was willing to pay the cost of postage. This is a new and different time. I've seen too many students spend too many hours in trying to use their word processor to create an elaborate graph that could have been done by hand in 15 minutes. A good proposal should consist of the first three chapters of the dissertation.
An excellent website with lots of highly specific information (especially if the focus of your work is in a scientific or technical area) has been developed by Joe Wolfe at The University of New South Wales (Australia). If you're going to ask for a leave of absence from your job while you're working on your research this isn't a good time to. Plus, you've not promised anything. Don't try to solve all of the problems in this one research project. You will be able to sequence them in the best order and then see what is missing and should be added to the dissertation. Sometimes a combined methodology makes the most how long to write a 5000 word essay sense.