Here is an example of how much time it could takes for volume production to begin. :

TowerJazz: A Towering Double In Share Price

''Many investors fixate on the newest cutting edge production technology and are concerned with who is ahead at the latest production node on the largest wafers. However, most of the chips we use are produced with old equipment on smaller wafers in order to keep costs low. No one is building new 8 inch or 6 inch (200mm or 150mm) wafer fabs these days, but those in existence are still useful for less demanding chips because the equipment is already paid for, so the cost to produce a chip with it is minimal. There are many areas where a specialty foundry can put capacity to use. This is demonstrated by the number of new mask sets that TowerJazz receives from customers. Two to six quarters after a design win, customers send mask sets to TowerJazz. Three to six quarters after receiving those mask sets, volume production begins. In the second quarter TowerJazz received 242 mask sets, up from 130 mask sets in the second quarter of last year. Production from those customers should ramp up throughout 2015.''