The four types of contemporary management are sociotechnical systems theory, quantitative management, organizational behavior and system theory. These approaches to management have all been developed at various times since World War 2 and continue to represent the corner stones of modern management thought (Vital source). Sociotechnical systems theory was developed in the 1950’s by the London based Tavistock Institute of Human Relations (Vital Source) .This is an approach to complex organizational work design that recognizes the interaction between people and technology in workplaces. The term also refers to the interaction between society's complex infrastructures and human behavior. In this sense, society itself, and most of its substructures, are complex sociotechnical systems (wiki). Quantitative management stems for the 1940’s and 1950’s and emphasizes the application of the quantitative analysis to management decisions and problems. This helps a manager make a decision by developing formal mathematical models of the problem which can be facilitated by the development of computers. This method is usually used in a supplement role in decision making (Vital source). Organizational behavior, also developed in the 1950’s, studies and identifies management activities that promote employee effectiveness by examining the complex and dynamic nature of individual, group, and organizational processes. Organizational behavior comes from a variety of disciplines including psychology and sociology, to explain the behavior of people on the job (vital source). Systems theory is the interdisciplinary study of systems in general, with the goal of elucidating principles that can be applied to all types of systems at all nesting levels in all fields of research (wiki). Open Systems Theory is a modern systems-based changed management theory designed to create healthy,