Hello! it was unexpected to see such a question here! As far as I know (and as Google says), this is the method that is used in business field of study. The point is to develop a theory on a specific example, such as developing your own subtask solution. I know a resource https://acasestudy.com/ where you can find more in-depth help and solutions. Also I would recommend you to read some articles on this topic, especially on world top universities blogs. Good luck!