Here a few quick tips for you. Start by selecting a relevant, satisfied and recent customer. Next, gain the required approvals. Fallow all internal policies regarding case studies, including getting input and approval from sales, marketing etc. Now, outline your case study. At a minimum, a business case study should include an introduction that summarizes the customer solution. Lastly, Distribute the case study . Determine the best methods to get the case study in the hands of prospective customers for maximum benefits.