You will find a drug and alcohol training, addictive disease progression curve here.
Follow the link below the form above to the handout and you can download the tip sheet for reasonable suspicion training at http://workexcel.com (look for tip sheet. The point is to have each supervisor with a copy while you discuss the progress and symptoms in the workplace. You will get some real discussion going, and the upside (the sneaky side) is that employees with an alcohol or drug addiction problem will be to self-diagnose. It's impossible not to personally self-diagnose one's own alcohol and drug program when reviewing these signs and symptoms in the DOT Reasonable Suspicion Training Class (see powerpoint)