4 2 Kristens Cookies a 1 Flow Chart

[4 -2] Kristen’s Cookies (a) 1. Flow Chart Order Kristen Roommate Wash & Mix Spoon Set the oven 6 min 2 min 1 min Roommate Pay Pack End 1 min 2. Theoretical flow time 6+2+1+9+5+2+1 = 26 minutes Bake 2 min Cool 5 min 9 min

[4 -2] Kristen’s Cookies (b) Modified Flow Chart Order Kristen Roommate Wash & Mix Spoon Set the oven 6분 End 2분 8분 Bake 1분 Roommate Pay Pack Cool 2분 5분 1분 10분 Theoretical flow time : 36 minutes 9분

[4 -2] Kristen’s Cookies (b) 1. Buying a second oven that can bake one tray of ond dozen cookies (b) 2. Buying a second oven that can hold two trays of ond dozen cookies each (b) 3. Buying a faster convection oven that can bake one dozen cookies in 6 minutes instead of 9 minutes 2

[4 -4] Honda’s motorcycle (a) A Process flow chart

[4 -4] Honda’s motorcycle (b) Theoretical flow time Path 1 2 3 4 : : 2 min 1 min 7 min + + 1 min + 30 min = 36 min 3 min + 30 min = 34 min 1 min + 30 min = 32 min 30 min = 37 min Theoretical flow time : 37 min (c) recommendation Theoretical flow time을 줄이기 위해서는 Critical Paths 의 flow time을 줄여야 한다. 즉, Path 4(fourth subassembly)의 경로에 있는 시트조립과 최종조립의 작 업속도를 올리거나(work smarter) 또는 시트작업은 다른 경로로 이동(work in parallel)하는 것을 검토해야 할 것이다.

[4 -6] Vancouver International Airport X-ray 18 bags /(1 min) 80% 20% Screening 1 min (a) The theoretical flow time? (1) 80% of passengers : 1. 5 bags/18 bags× 60 = 5 seconds (2) 20% of passengers : 5(s) + 60(s) = 65 seconds (3) 5× 80% + 65× 20% = 17 seconds (b) The flow time efficency? 17 / 135 = 12. 59%