Others, like "Management by Wandering Around," got to be quite annoying as the commandant would suddenly appear in a training session and disrupt it and then leave...this is when I started to really despise management "experts" and their shallow writings.
Unfortunately, it isn't just in management theory that my beloved profession tends to follow trends. Over the decades I have found a lot of policy that came from politics and not legal or practical foundations.
One sad example is how we treat our brothers and sisters when they win an armed confrontation. I have talked to many officers over the years who told me the real trauma to them was not winning a gunfight but the way the agency and its "mental health professional" dealt with them afterward.
One poor guy I talked to had been through five years of therapy because he said he felt good after killing a hostage taker and saving the hostage. Because he felt good for stopping evil, saving the innocent, and doing his job he was thought sick. But there's nothing wrong with feeling good about destroying an evil and ending a threat.
The highly readable book "One Nation Under Therapy" describes how post traumatic stress disorder (PTSD) became a politicized syndrome and how the hard science about this condition has been largely ignored. Consequently, the traditional healing venues of faith, camaraderie, and family that had worked for centuries for soldiers, cops, and disaster victims have been replaced by "The Therapist."