The need for research will depend upon your assignment. Sometimes, your instructor may simply want you to use the information in the case and your class textbook and notes. In other cases, your instructor may require you to find and cite outside information, for example, articles or other information, to support your case analysis and solutions. 

You may find more information about how to do library research when analyzing a business case on the For Students: Writing a Case Analysis page on the Business Case Studies Research Guide.