Small business owners and managers face special challenges when training their employees. The owners and managers in businesses of this size (less than 100 employees) are often counted on to participate in the delivery of the company's products or services and train new employees at the same time. They do not have human resource departments or training departments. Consequently, any training that employees receive usually occurs entirely in an on-the-job training (OJT) format. This makes it very difficult to properly train new people who join the company or to improve the skills of the existing staff.