Writing casual stuff is simple. That will be especially true when the writing is not set for any academic purpose. Even the wrong grammar may be the things that will make your writing seem cool to read. But still, taking the casual writing style is not always work positively in any academic based writing. The technical stuff such as the citation will set a big different any casual based writing and any academic writing.
If you have no idea about the case study format, you will have a difficult time to finish such writing in a correct manner. Basically, such academic writing will let you to focus on certain limited subject. Giving the detail will be the key for this kind of writing. At least you will need to write about the background information, problem statement, the case data analysis, giving some alternative solution and the recommendation.
If time limit is so short, writing in a great detail is not always easy. For the alternative, you can visit the http://overnightessay.com/