It refers to reducing lead times and not sustainable lead times.

pg. 15

“The SHIMA SEIKI MFG., LTD. seamless Whole Garment® knitting machines and equipment at the Shinonome factory are also used in our knitwear atelier at the Ariake headquarters. Having a nearby factory and atelier use the same machines reduces the number of sample adjustments and greatly decreases the lead time from planning 3D-knit products to undertaking mass production. This puts us one step closer to our goal of ensuring we have the products that customers really want right when the customers want them.”