toy airplane manufacturing ted pelzer todd madole christian mickelson
TRANSCRIPT
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Toy Airplane Manufacturing
Ted PelzerTodd Madole
Christian Mickelson
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Outline
Problem statement Assumptions Deterministic Modeling As-is model To-be model Best solution
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Problem Statement A toy company produces 3 types of
planes Expected demand increase of 30% Travel in batches of 24 using AGVs 8 hours of production in one day Determine the total machines, AGVs
and operators required
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Given Data
Opn Description Operation Time Resource Move Logic
10 Die Casting 3 min (outputs 6 parts) Automated die caster.3 min
20 Cutting Triangular(.25,.28,.35) Cutter none
30 Grinding Sample Times: .23 .22 .26 .22 .25 .23 .24 .22 .21 .23 .20 .23 .22 .25 .23 .24 .23 .25 .47 .23 .25 .21 .24 .22 .26 .23 .25 .24 .21 .24 .26
Grinder .2 min
40 Coating 12 min per batch of 24 Coater .2min
50 Inspection and Packaging Triangular(.27,.30,.40) Packager exits with 88% yield
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Assumptions Ignored statistical outliers Move times determined speed and
distances Batches consist of similar plane type Operation times are the same for each
plane Any retooling is assumed in operation time
Number of operators must equal number of machines
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Deterministic Modeling
(Assuming worst case scenario for operation times)
Processing Time * Total Planes = Total minutes required Total Minutes required /Total time in day = Total Machines
needed
Cutter: .35 min * 4300 planes = 1505 minutes required 1505/480 = 3.1 machines => 4 Cutting
machines
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As-Is Model
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As-Is Model Every 30 minutes a Die Casting machine
needed to be serviced Repair time is N(8,2)
Resource Quantity Average UtilizationDie Caster 8 63.67%Cutter 4 74.49%Grinder 3 78.47%Coater 5 78.00%Packager 2 82.10%
AGV 3 6.08%Mechanic 3 42.58%
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AGV Analysis
Analyzed AGV path networks Both needed 3 AGVs
Utilization % Notes:1-Path Network 30.40% Less safe, more area
is covered
3-Path network 8.01% More Safe, small area covered. Also no collisions possible
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To-Be
Demand increase of 30%
Resource Quantity Change Average UtilizationDie Caster 10 +2 67.12%Cutter 5 +1 78.22%Grinder 4 +1 77.46%Coater 6 +1 84.89%Packager 3 +1 71.58%
AGV 3 0 8.01%Mechanic 3 0 63.42%
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Best Model
Reduce downtime to every 120 minutes
Percent Yield Increased to 3-Sigma Reduced scrap from 805 to 63 planes Resource Quantity Change Average Utilization
Die Caster 8 -2 74.30%Cutter 4 -1 86.89%Grinder 4 0 68.79%Coater 5 -1 90.36%Packager 2 -1 94.61%
AGV 3 0 7.15%Mechanic 1 -2 42.36%
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Conclusion Implement the creative solution if possible. Increasing the efficiency Reducing the overall number of machines in
the facility and increasing quality will Reduce machine costs Reduce workforce costs Reduce material costs Reduce WIP