Managing cash is essential for manufacturing companies because it directly impacts their ability to run smoothly and maintain long-term sustainability. The Miller-Orr model, developed in 1966, is a seminal framework for managing cash balances, offering a method to determine the optimal cash balance a firm should maintain to minimize transaction costs and interest lost on idle cash. However, the traditional model has limitations, particularly in its assumption of constant cash flow variability and its neglect of modern manufacturing complexities. This contribution aims to explore the integration of an enhanced version of the Miller-Orr model into manufacturing companies’ strategies to promote sustainable development. The work begins with overviewing the traditional Miller-Orr model and identifying its limitations. Subsequently, the authors introduce the enhanced model and discuss how it addresses contemporary manufacturing challenges. Finally, it is examined how the enhanced Miller-Orr model can be integrated into manufacturing strategies to achieve sustainability goals.