Any organization or any business of any size will always have tasks, goals, and objectives that will need to be completed fully and as efficiently as possible. Understanding how four contemporary approaches to management and how they differ from each other gives you a better grasp on tasks flow superbly through a successful business and goals are achieved. As well as understanding the management approaches, learning how the composition of the organization and the internal and external factors within can have a significant impact on how well you can manage your business. The purpose of this paper is to distinguish between the four significant contemporary theories as well as define open systems and the factors that fall within the organization. The four contemporary approaches to management are: sociotechnical systems theory, quantitative management, organizational behavior, and systems theory. They all differ in their own ways. Sociotechnical system theory is a contemporary approach to management that believes that the set combination of workers and their knowledge, training and tools leads to the organizational effectiveness in satisfying customers. Next is quantitative management which gives a more objective approach to problems and solutions that arise during workplace challenges. The objectiveness of this theory allows for easier baselines and goals that are assessable. The theory involves using mathematical modeling to solve these challenges, but it is mostly used