Hal Case Study

2523 WordsSep 16, 201311 Pages
HAL, Inc. is a major manufacturer of computers and computer components. In one of their plants they made printed circuit boards (PCB’s), which were used by other plants in the company in a variety of computer products. The basic process runs 3 shifts per day and it can be briefly depicted by following flow diagram Optical Test-internal Pro-Coat Copper plate Drilling Optical Test- external End of line test Sizing Machining Lamination core Treater procMess Internal circuitize Lamination composite External circuitize The targeted output for the plant is 3000 boards per day, five days a week, with plant running three shifts per day. But the plant has been failed to reach and maintain the targeted throughput at a…show more content…
ρ=WIPnb-uWIPnb ρ=53.52-0.9953.52 ρ=0.98 TR= 1-uρb-11-u2ρb-1x ra TR= 1-0.99x0.9810-11-0.9920.9810-1x 0.0434 TR= 0.0414 Cd2=1+1-u2Ca2-1+u2m(ce2-1) Cd2=1+1-.9920.546-1+0.9925(0.526-1) Cd2=0.7832 5. Expose and develop b = 10 ra=0.0414 Ca2=0.7832 Expose Develop Preemptive outages; Effective processing time (te) = t0A Effective processing time for a batch = (.33/0.99)*60 = 20 min Ce2= C02+1+Cr2A(1-A)mrt0 = 0+1+0x0.99x1-.99x18019.8 =0.09 As: No variation in repair (constant distribution) Utilization for develop = raxtem = 0.0424x201 =0.848 U<1 According to blocking calculations, WIPnb=(Ca2+Ce2)2u21-u+u
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