This report discusses the impacts of changes on business strategies and operations, influences of internal and external factors on organisational behaviour, barriers in changes that impact leaders decision-making process, and leadership approaches that help business to initiate changes. The report includes a comparison of the outcome of change on business operations and business strategy of Tesco and M&S, evaluation of the influences that drivers of change have on organisational behaviour, influence of obstacles to change on leadership and decision making, and application of a range of leadership approaches to a change initiative. The subject of the report is Leadership and Change management, and the course code and college/university are not mentioned.