Technique/definition, explain/discuss/analyse, example, link to objectives/case study for each concept required = 15 ~ 20/20.
Not sure what other advice can be given to you for a report than to just follow the structure of the report, relate your arguments to the report case study and be wary of the type of answer the question wants (e.g. "recommend", "discuss", "analyse" etc...)
EDIT: Diagrams can strengthen your report
For case study essay I can't tell you anything you don't already know. Obvs have strong case study company examples in mind, follow a structure you are comfortable with and have sub-headings.
Me personally I like to follow a simple structure where I describe whatever concept I'm writing about, describe any components, give it's advantages and disadvantages, give example case study then link to objectives. Repeat process = 19~20/20 usually