The foundations of our consultancy were developed by The Extensor Group which preceded us.  Extensor did its pioneering work in productivity and performance improvement during the early 1970s using cutting edge electronic instrumentation that measured people’s self-reported productivity against more than 300 variables.  Years of research, millions of years of performance histories and 5 Ph.D. dissertations led to the identification of the 30 variables that affect human performance.  In a 1974 conversation, Peter Drucker told Tor Dahl, “The invention of the Extensor unit is to the field of management what the invention of the telescope is to the field of astronomy.”