Determining if employees have learned is a matter of building evaluation into the training. Employees can be tested to determine if they have learned, but be sure that tests are based on the training objectives. if the training is valid and employees have learned, the training should make a difference in their performance. Performance on the job should improve. This means safety and health should be enhanced. Safety and health professionals can make determinations about performance using the same indicators that told them training was needed in the first place.