In Focus: CRAC
The most important tool in leading the reader through the argument is a writing style called CRAC. CRAC is an acronym for Conclusion, Rule, Application, Conclusion. It basically means that you start out with what you want to convince the reader of. Then you tell the reader what requirements have to be fulfilled to come to that conclusion in an abstract way, ideally supported by authority (i.e. cases, awards or scholarly writings). Than you apply the facts of the case to this rule. Be thorough and precise here! The application is where you have to use every useful piece of information contained in the facts, i.e. in case of the Vis the problem. Finally, you repeat the conclusion as the result of this application.
Albert-Ludwigs-Universität Freiburg, Memorandum for Claimant, 14th Vis Moot, 1st place
As seen in the example one can of course pyramid this structure. E.g.:
Rule 1 containing Elements A and B
The example above also goes to show that cases can be used as authority in support of the rule if you are relying on an abstract finding of a certain juridical body. They can, however, be used as part of the application as well, particularly, where the underlying facts are comparable to the facts of the problem. Such cases can be used to support your application of the present facts to the rule you established since the respective juridical body applied similar facts to a similar or perhaps identical rule. Furthermore, while scholarly writings can be used as authority in the rule, they can also sometimes be included in the application where a statement by an author is directly linked to a certain fact that is applied to the rule.
CRAC also helps to reduce redundancies and make the memorandum logically coherent. You should go through your entire memorandum and structure it that way.