There aredifferentfunctions performed by organisation that consist of marketing , human resource function, accounting and finance and research and development.This assignment will include marks and Spencer to perform various task of this study. Moreover, it will include the importance and value of operation management in achieving business objectives.This study will assess the factors within the business environment that impact upon operational management and decision making by leaders and managers. Define and compare the roles and characteristics of managers and leaders Manager of an organisation is responsible