What are Industrial Case Studies and why are they required?
I could not find a specific definition; however, I found a few Industrial Case Study examples from your and similar fields that may be useful analogs for you to model your case study off:

"An Industrial Case Study of Immediate Benefits of
Requirements Engineering Process Improvement at
the Australian Center for Unisys Software" (Damian et al. 2004).

"http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA446147" (Cook and Wolf)

"Process Monitoring using a Combination of Data driven Techniques
and Model based Data Validation" (Duchesne et al. 2007)

"Signed Directed Graph Based Modeling and its Validation from Process Knowledge and Process Data" (Yang et al. 2012)