Craft n10 50 3 large size problems most practical

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(CRAFT//..) (N=10 - 50) 3. Large Size Problems (Most Practical): Computer Simulation. (Special Language: GPSS) (N > 50)
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Service Operations Layout- I Office (Service) Layouts: Recent Poll: A 1400 service worker poll revealed that 75% felt a better layout would improve their productivity Management indirectly used layout as a “spatial language” to say: You are special? Out of supervisor’s watchful eyes/ Satisfied social needs Proximity : The unusual approach is to design office layouts around work flows and communication patterns The assumption is that proximity helps with understanding, mutual interest, and even friendship Privacy: Crowding and noise can hurt performance and attitudes
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Service Operations Layout- II Options in office layout Privacy is expensive. The capital investment in open-plan layouts is about 40% less. An open plan maximizes flexibility. A trade-off between privacy and proximity is possible. Traditional layouts: Closed offices for some Open areas for others Office landscaping Everyone in the open: plants, screens, and portable participations for semiprivate space Activity settings Home based: a personal nook; position mo longer means place Multiple workplaces Telecommuting or electronic cottage
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Product Layout Design Line layout: * all work stations are located along production line in a pre-specified sequence. * a series of operations performed in the same order. * a transportation device connection all WSs to form a line * all machines are dedicated to perform certain operations tasks. Design questions: * how many work stations in the line? * how operation tasks are assigned to each work station? There is no relative position issue in line layout design.
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Layout Types (b) Product (Line) Layout (b) Product (Line) Layout Station 1 Station 2 Station 3 Station 4
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In a Hospital for an Medical Exam Receptionist Sign Up Temperature Height/Weight Blood Pressure Blood By A RN By A D.A -------- See Doctor Exit Pre-Check Up Sample Taken Test- 1 Test- 2 Test- 3 Entrance It is a Line-Layout
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In an Museum Entrance Showroom 1 Showroom 2 Showroom 3 Showroom 6 Showroom 5 Showroom 4 Showroom 7 Showroom 8 Showroom 9 Exit Gift Shop It is a Line-Layout
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Why Line Need Be Balanced? Example: Tasks: A B C D E F G H I J Op.time: 2 3 9 1 14 16 4 1 7 13 Work station: (1) (2) (3) (4) (5) Precedence requirement: A—B—C—D—E—F—G—H—I--J Initial assignment: Tasks: (A,B) (C,D) (E,F) (G,H) (I,J) WSs: (1) (2) (3) (4) (5) Question: how about the performance of this production line?
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Initial Assignment : Tasks: (A,B) (C,D) (E,F) (G,H) (I,J) WS : (1) (2) (3) (4) (5) Process time: 5 10 30 5 20 Idle time: 25 20 0 25 10 1. Shortest Time Interval a Finished Product out off Line = 30 2. Stable Output Rate of this Line = 2/hour 3. Idle (Slack) Time at Each WS ( 25+20+0 +25+10=80) 4. Total Slack Time of the Line = 80 5. Is this Line Balanced ? No
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New Assignment : Tasks: (A,B,C) (D,E) (F) (G,H,I) (J) WS : (1) (2) (3) (4) (5) Process time: 14 15 16 12 13 Idle time: 2 1 0 4 3 1. Shortest Time Interval a Finished Product out off Line = 16 2. Stable Output Rate of this Line = 4/hour 3. Idle (Slack) Time at Each WS (2+1+0 +4+3=10) 4. Total Slack Time of the Line = 10 5. Is this Line Balanced ? Yes, almost!
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Why line need be balanced (II)
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