HW01_key-Sp11

HW01_key-Sp11 - MGMT 36100 HW 01 40 Points Due September 9...

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MGMT 36100: HW 01 40 Points Due: September 9, 2009 Write proper dimensions at each step. Question 1 (4 points: 3, 1) Consider problem 2, page 59 from the textbook (“Rockness Recycling”) and answer the following. (a) Calculate capacity of each stage (per week) and identify the bottleneck. Step 1: 60/1*40 = 2400 students/wk Step 2: 60/1.5*40 = 1600 - represents the bottleneck in the system Step 3: 60/.8*40 = 3000 Step 4: 60/1*40 = 2400 Step 5: 60/1.2*40 = 2000 (b) If the process needs to handle 2000 students per week, what should be the largest processing time per student (in minutes) at the bottleneck stage? 40/2000*60 = 1.2 minutes Question 2 (7 points: 3, 1, 3) A process has 3 stages as shown. P1, P2 etc. are the labels for the machine and the other number in the box is the machine capacity in units per hour. (a) What is the cycle time for each stage (in minutes per unit)? Round off to 2 decimal places. Stage 1 - P1: 1/15*60 = 4.00 [min/unit] Stage 2- R1: 1/15*60 = 4.00 [min/unit] Stage 3- M1: 1/12*60 = 5.00 [min/unit] (b) Identify the bottleneck stage : Stage 3 (c) If you can add only one machine in parallel at the bottleneck stage, what should be the largest cycle time for the new machine so that you increase the process capacity as much as possible? A machine should be added to stage 3 with the capacity of 3 [units/hour] i.e. the largest cycle
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HW01_key-Sp11 - MGMT 36100 HW 01 40 Points Due September 9...

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