In regards to preparing a capital investment analysis for a robot-guided aluminum window machine that automate the entire window-casing manufacturing line.

What are the different factors can be used other than involving qualitative inputs into the capital investment decision and the value chain, normal net present value analysis (which produced a significant negative result) factoring figures for customer satisfaction, scrap reduction, reduced inventory needs, and reputation for quality?

Or is these factors are considered enough? and what are the reasons?

(please include references and extra readings)