A truly lean system is highly dependent on what aspect and relies on whom?

A truly lean system emphasizes the importance of meeting customer demands as a key aspect of its operational framework. The concept of lean is fundamentally centered around value creation for the customer while eliminating waste. This means that the system must be agile and capable of adapting to changes in customer preferences and requirements. When a lean system relies on customer demands, it ensures that products and services are aligned with what the market truly needs, leading to better customer satisfaction and reduced excess inventory.

Additionally, the reliance on supplier reliability plays a critical role in maintaining a lean operation. Suppliers need to be dependable in providing materials and components just in time to align with production needs, thereby preventing interruptions and minimizing waste from overproduction or stockpiling. When both customer demand and supplier reliability are in sync, it fosters smooth operations, encourages efficient use of resources, and supports continuous improvement — all foundational principles of lean methodology.