Quote from : Zara and her Sisters: The Story of the World's Largest Clothing Retailer Book

It is not in vain that the strategic criterion of placing only short runs on the market prevails in order simultaneously to create a feeling of scarcity and avoid an appearance of uniformity, both of which encourage consumer demand. This is such a powerful criterion that it is not uncommon to discontinue production of a much-sought-after product, sometimes to the relative desperation of the shop staff, who were sure they could sell it.