While reading about high technological topics like dynamic scheduling in FMS in the context of Industry 4.0, being an Industrial Engineer, I find it very difficult to study about handling dynamic environment with codes. At the same time, I think this research topic is a hot area for research.
When I read about lean management tools such as value stream mapping. I find it easy. At the same time, I think this research topic is already being implemented everywhere and research papers are available with case studies.
Which topic should I choose? (trending+difficult vs easy+already implemented)