Creative teams consisting of designers, sourcing specialist and product development personnel, develop design collections. The teams work simultaneously on different clothing, building and improving on styles previously available. Zara’s designers are trained to limit the number of changes made by lowering the number of samples required, minimizing cost and turnover time. Its demand based production or Just-in-time (JIT) production reduces the amount of inventory available, lowering Zara’s storage cost. Zara's outstanding lead time is unbeatable in the industry at the moment. Furthermore, Zara eliminated the traditional design process, where design and development overrides fabric procurement. In Zara, the design teams work with the available fabric, allowing for faster fashion.