Donner Company Case Solution

Donner Process Flow Preparation Stage Image conveyance of title Pinning grace to apply table operationing Holes CNC utilization Press Metallization Washing scrubbing and coating of bloodshed with DFPR coalition of Customer Artwork and characterisation to UV DFPR Developing tool Electroplating and throne Plating Chemical Etching of DFPR and Copper bottom Pinning im circuit card to usage table Drilling Holes CNC Drill Press Metallization Washing scrubbing and coating of panel with DFPR coalescency of Customer Artwork and exposure to UV DFPR Developing machine Electroplating and derriere Plating Chemical Etching of DFPR and Copper class Fabrication conjoinmask Silk screening Solder Bath Reduction to ruin profile by CNC routing/ cowhand abbreviate Soldermask Silk screening Solder Bath Reduction to undefiled profile by CNC routing/ perforate coerce Order Size in drilling allow Order size of it = N If manual ask is used, then time taken to scoke N coiffures = 15 + N*0.08*500 = 15 + 40N If CNC is used, then time taken to punch N orders = 240 + N*0.004*500 = 240 +2N Hence it is clear that CNC should be used yet when time taken by CNC is splendid that time taken by manual press i.e.

15+40N >= 240 + 2N => N = 6 Hence for Order sizes 6 or preceding(preno bital) CNC should be used and order sizes below 6, manual press should be used CNC Routing Let number of Orders = N getaway clip for punch press = 50 + N clock for CNC Router = 150 + 0.5N Again, CNC router should be used only if 50 + N > 150 + 0.5N * N = 200 Capacity of DFPR subject empyrean (Order size assumed to be 8) Ti me taken for panel preparation (one panel ha! s eight circuit boards, hence 8 orders is serviced by a single panel preparation) = 5 + 0.2 = 5.2 bit Time taken for Lamination and exposure = 20 + 2 = 22 min Time taken for Developing = 20 + 0.2 = 20.2 min Hence the bottleneck work on here is Lamination and exposure which takes 22 min for an order size of 8. Hence capacity of this process = 1/22 panels per minute = 60/22 panels per hour = 2.72 panels...If you want to get a proficient essay, order it on our website: OrderEssay.net

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