2. Human Relations Skills. Human relations skills are also called Interpersonal skills. It is an ability to work with people. It helps the managers to understand, communicate and work with others. It also helps the managers to lead, motivate and develop team spirit. Human relations skills are required by all managers at all levels of management. This is so, since all managers have to interact and work with people. 3. Technical Skills. A technical skill is the ability to perform the given job. Technical skills help the managers to use different machines and tools.