Briefly, strategy is both an analytic and synthetic thinking process. Analysis is the taking apart of things to see how they work, whereas synthesis (integration) is the putting together of parts to make a whole: one that works. In your papers, I assume professional quality critical thinking and argument presentation skills, including proper in-text referencing of all sources (no plagiarism) AND an ability to analyze a case, find those aspects that you want to focus on (theme), choose the methods, concepts, data and references that help you illuminate your theme, and the synthetic ability to put the pieces (insights, trends, patterns, etc.) together to form a defensible strategy.
Your format of paper is up to your team, but in general there is a six-page limit (excluding bibliography and appendix). Strategy is a defensible and empirically supported storyline about what and why an organization (or person) is going to do this or that in this or that way in the future; not another.