A rather too general question, I think. And vague.

dear Michael Patriksson is there no answer for general questions?

I assume that you have more detailed ideas/wishes/purposes and questions than that. Perhaps you actually mean to ask how to

- write a research proposal?

or

- write a paper within a project?

You really should be more detailed in your question - I do feel that you have not provided enough details.

Further, you don''t "write a project" - you perhaps "write a project plan".

Michael Patriksson

Thanks for your guidance and actually I need some help to write a Project Plan in the field of Applied Mathematics - Wave Propagation in different media by using different techniques to solve the problems.....