There are 8 drill machines which can produce 1 piece per cycle The operator can
ID: 389402 • Letter: T
Question
There are 8 drill machines which can produce 1 piece per cycle The operator can load raw stock in 12 seconds and unload in 12 seconds The machine takes 15 seconds to process The drill has a machine reliability of 90% and scraps 5% of the product What is the TAKT time for the drill How often can the drill produce a unit (TAKT time) There are 10 mill machines which can produce 1 piece per cycle The operator can load raw stock in 20 seconds and unload in 8 seconds. The machine takes 25 seconds to process. The mill has a machine reliability of 95% and scraps 15% of the product What is the TAKT time for the mill How often can the mill produce a unit (TAKT time) (Ctrl)Explanation / Answer
Drill machine
Number of drill machines = 8
Processing time per unit = 12+15+12 = 39 seconds
Effective output per cycle = Reliability * ( 1- scrap rate) = 90%*(1-5%) = 0.855
Takt time = Processing time per unit / (Effective output *Number of machines )
= 39/(8*0.855)
= 5.7 seconds
Milling machine
Number of machines = 10
Processing time per unit = 20+25+8 = 53 seconds
Effective output per cycle = Reliability * ( 1- scrap rate) = 95%*(1-15%) = 0.8075
Takt time = Processing time per unit / (Effective output *Number of machines )
= 53/(10*0.8075)
= 6.6 seconds
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