Answer: Robert L. Katz proposed that managers need three critical skills in managing: technical, human, and conceptual.a. Technical skills are the job specific knowledge and techniques needed to proficiently perform work tasks. These skills tend to be more important for first-line managers because they typically manage employees who use tools and techniques to produce the organization's products orservice the organization's customers. Often, employees with excellent technical skills get promoted to first-line manager.b. Human skills involve the ability to work well with other people both individually and in a group. Because all managers deal with people, these skills are equally important to all levels of management. Managers with good human skills get the best out of their people. They know how to communicate, motivate, lead, and inspire enthusiasm and trust. c. Conceptual skills are the skills managers use to think and to conceptualize about abstract and complex situations. Using these skills, managers see the organization as a whole, understand the relationships among various subunits, and visualize how the organization fits into its broader environment. These skills are most important to top managers.