"Engineering Case", "Case", and "Case Study" are used loosely and interchangeably in engineering. Others may prefer broader or narrower definitions, but to us an Engineering Case is: an account of an engineering activity, event or problem containing some of the background and complexities actually encountered by an engineer. A case is used in engineering courses to enhance learning about engineering principles and practices. - GMU LibGuide
Use "case study" or "case studies" with engineering terms.
Are We Cleaning Up? : 10 Superfund Case Studies : A Special Report of Ota's Assessment on Superfund Implementation. United States. Congress. Office of Technology Assessment. 1988.
EPA’s Superfund program is responsible for cleaning up some of the nation’s most contaminated land and responding to environmental emergencies, oil spills and natural disasters. To protect public health and the environment, the Superfund program focuses on making a visible and lasting difference in communities, ensuring that people can live and work in healthy, vibrant places.