What is the relationship among the four levels of evaluation? Would you argue for examining all four levels if your boss suggested that you should look only at the last one (results) and that if it...

What is the relationship among the four levels of evaluation? Would you argue for examining all four levels if your boss suggested that you should look only at the last one (results) and that if it improved, you would know that training had some effect?

How may an organization determine which training it wants to evaluate and what type of evaluation to use to determine the cost effectiveness of a training program?