Clearly inform employees what conditions are infractions of departmental safety rules. Give supervised work experience before allowing employees to perform hazardous operations on their own. Examination of case histories, scenarios, and role-playing are often used in group situations. These techniques require advance preparation on the part of the instructor and careful consideration of the audience. Some audiences will respond well while others may not.
Lectures are the cheapest, most commonly used, and least effective method of safety training.
Involving trainees in discussions or question and answer sessions are a way to make lectures more effective. Printed materials are useful as supplementary information, but the material and audience must be compatible. When deciding which combination of approaches will work best, the supervisor must keep the information and the audience in mind. For instance, lecture style would not be suitable for training employees in the safe operation of a centrifuge. The safety trainer must also consider the conditions under which the training will be given.