I was not specific enough in my descriptions of formulas. Fitting formulas such as NAL-NL1, NAL-R, DSL v5, POGO etc. are developed by researchers. Standard real-ear machines compare against these data-based formulas (developed through testing and research with ACTUAL wearers).
The formulas in use by the manufacturers are based off of these types of formulas. The manufacturers apply some changes to their own fitting formulas that affect the first fitting of the hearing aids.
What I am doing when I perform a REM is measuring the ACTUAL sound production of the hearing instrument in a persons ear and comparing it against the RESEARCH based fitting formulas.
I can see how some others have taken some offense at your statements. REM have been in existance for many years and have countless hours of research involved in the development of formulas and the verification of results. By saying they have no value you are discrediting the work done by many doctors and graduate students. As a hearing professional it is our goal to improve the hearing of people. So many hours would never have been put in if REM had no value.