Theorists like EFL Brech and Peter Drucker (Management in the Purchasing Function, 2010) also suggested that management involved certain basic functions designed to bring system, order, rationality and consistency to the organizational environment. Brech identified four main functions of management, which includes planning, control, co-ordination and motivation. Peter Drucker has also suggested five management functions: objective setting, organizing, motivating & communicating, measuring and developing people.