This document discusses implementing a holistic lean system thinking approach to improve business profitability. It begins by outlining typical challenges small and medium enterprises face with stagnating sales growth and fluctuating profits. It then discusses how changes in the external environment and internal organizational issues can contribute to these problems. The document proposes applying lean system thinking as a solution, which involves eliminating waste throughout business processes. Examples of waste in operations are provided, as well as typical lean tools and techniques. Case studies demonstrate how lean system thinking has helped other organizations improve turnover, reduce costs, and increase profits. The document concludes by addressing common misconceptions about lean and reasons some organizations struggle with implementing it.