There is no single, unquestionable measure of quality and value, and these terms are not synonymous.
From Redish and Ramey study conclusion is that the value of technical communication is partly demonstrated by the revenues generated or expenses avoided as a result of the communication products we produce.
Usability has emerged as a leading characteristic of quality technical communication, but it does not assess quality, rather it assesses the effectiveness of technical communication products in meeting users’ needs.
Some customers perceive quality and value of TC products not by the products themselves, but on the “customer service” provided to clients by TCs.
Lack of cohesive framework for considering issues of quality and value. Lack of consistently used, widely accepted methodology for assessing quality and value.