Salespersons are the most difficult group to manage. If they are managed well, the company's performance will rise rapidly. If they are not managed well, they will just wait for bankruptcy. Salesman positions are not standard positions, and their jobs are difficult to quantify from their daily work. For example, you can see that a salesman is working hard on the surface, but he is actually playing in an outside Internet cafe. Some salespersons seem to be joking and not doing anything, bu...