Demand Readiness Level: The DRL Scale as New Proposed Tool to Hybridize Market Pull with Technology Push Approaches

What is the DRL/TRL level? Customer Voice are sunken inside the TRL scale and our minds are Technology Push driven. Why not referring to a scale related to the Degree of Maturity for the Expression of a Need by a customer on a given market including the lead markets for eco-innovation? Why not define this scale and plot it in a reverse manner related to the classic TRL scale?