Costco has many positions in the store and in office, so it should apply the classroom training into their training program for employees who work in office. This method has an expert teach employees a new knowledge in classroom. Sometimes, employees need to learn something new that just come into companies. It helps employees to understand how to use it, apply it in the jobs and increase their abilities. For example, in the accounting department, when the government launch the new program to calculate the account, a supervisor must allow some employees train this method and apply in their department.