The first step, I believe, is to understand who are you reporting to, what is their technical background and why are they interested in your report. Consequently, you will gain a better understanding of what to include in your report and how in-depth you should get with the details. The next step would be to research your topic to find similar projects this will be both used as a sample to guide you in writing and styling the report and material to reference when writing the introduction and theory. The next sections of the report are derived from your work, it is therefore essential to have a great understanding of all that went down and their importance to keep the writing coherent and cohesive . You should also take the time to proof read your work after it's done.