Operational excellence focuses on continuous improvement through lean, six sigma and lean six sigma approaches. It aims to optimize processes by focusing on customer needs and empowering employees. Caterpillar deployed lean six sigma across 27 business units to regain industry leadership. PASCO trained employees in lean six sigma to drive a culture change and focus on high potential markets and product innovation. ScottishPower used lean six sigma to improve customer service and sales operations to increase its market share.