Here is the deal
According to the economic theory of the firm average cost theory. There are 2 categories namely production output and capital cost.
First stage is to categories which variables of the industry 4.0 is belong to which category.
Second stage will need to see how to integrate them into the average cost theory
Third stage – link it to the ROI theory.
To start the process it is still back to the literature review so that the arrangement according to the categories will able to cited and supported by the previous academic literatures.