Managing Director Patrick Prendergast and Director Mark Chaplin, from the Machinery and Equipment Services practice at Duff & Phelps, had an article published titled Estimating Economic Obsolescence-Why the Inutility Formula is of Limited Utility in the MTS Journal.
The article addresses what the Inutility Formula is, and just importantly, what it is not. Economic Obsolescence ("EO") can be due to a variety of factors. The Inutility Formula can be used in certain circumstances to quantify EO; however, it cannot quantify all forms of EO.
Read the full article here