Consider two stations in series. Each is composed of a single machine that requires a rather lengthy
Question:
Consider two stations in series. Each is composed of a single machine that requires a rather lengthy setup. Large batches are used to maintain capacity. The result is an effective process time of 1 hour per job and an effective CV of 3 (that is, te = 1.0 and 2 = 9.0). Jobs arrive in a steady stream at a rate of 0.9 job per hour, and they come from all over the plant, so ca = 1.0 is a reasonable assumption (see the discussion in Chapter 8). Now, suppose a flexible machine is available with the same capacity but less effective variability (that is, te = 1.0 and 2 = 0.25) and can be used to replace the machine at either station. At which station should we replace the existing machine with the new one to get the largest reduction in cycle time?
Calculus Early Transcendentals
ISBN: 978-0321947345
2nd edition
Authors: William L. Briggs, Lyle Cochran, Bernard Gillett