146.5 and s = 2.0 and the A process is in statistical control with x specifications are at LSL = 140 and USL = 150. a. Items that are produced below the lower specification limit must be scrapped, while items that are above the upper specification limit can be reworked. What proportion of the process output is scrap and what proportion is rework? b. Because scrap is more expensive than rework, the process has been centered closer to the upper specification limit. If scrap is twice as expensive as rework, is the process mean at the best possible location? What value of the process target would you recommend to minimize total costs