Operations Management
National Cranberry Cooperative
Case Objectives: Process
P
A
Analysis
l i &C
Capacity
it
Planning
~ Flow Diagram
~ Bottleneck Analysis
~ Little’s Law
~ Utilization Profile
~ Inventory Build-Up diagram
~ Analysis of Possible Investments
1
Dry berries bbl/hr Trucks in
Queue
Wet berries bbl/hr Kiwanee Dumpers
C=
U=
Bins 1-16 storage =
C=
Bins 17-27 storage =
Destoners
U=
Dechaffers
C=
U=
Dryers
C=
U=
Separators
C=
U=
Bulk and Bag
2
1
4/3/2012
Operations Management
Capacity and Utilization Analysis
Operation Capacity
Utilization
Dumpers
1 truck/7 truck/7.5 5 min = 75 bbl/7 bbl/7.5 5 min × 60 min/hr = 600 bbl/hr 1440/3000 = 48%
5 × 600 bbl/hr = 3000 bbl/hr
Storage
Bins
Dry: 16 × 250 bbl = 4000 bbl
Wet: 8 × 250 bbl + 3 × 400 bbl = 3200 bbl
To be determined by buildup analysis
Destoners
(dry only)
3 × 1500 bbl/hr = 4500 bbl/hr
360/4500 = 8%
Dry: 1 × 1500 bbl/hr = 1500 bbl/hr
Wet: 2 × 1500 bbl/hr = 3000 bbl/hr
Wet
Dry: 360/1500 = 24%
Wet 1080/3000 = 36%
Wet:
3 × 200 bbl/hr = 600 bbl/hr
1080/600 = 180%
Dechaffers
Dryers
(wet only)
Separators
1440/1200 = 120%
3 × 400 bbl/hr = 1200 bbl/hr
(360+600)/1200 = 80%
Implied vs. actual utilization
17,280 bbl/day ÷ 12 hr/day = 1,440 bbl/hr
Operations Management
Trucks in
Queue
Dry berries
0.25(1440)=360 bbl/hr
3
Wet berries
0.75(1440)=1080 bbl/hr
Kiwanee Dumpers
C = 3000 bbl/hr
Bins 1-16 storage =
U = 48%
Bins 17-27 storage =
4000 bbl
3200 bbl
Destoners
C = 4500 bbl/hr
U = 8%
Dechaffers
C = 1500 bbl/hr (dry), 3000 bbl/hr (wet) U = 24% (dry) 36% (wet)
Dryers
C = 600 bbl/hr
U = 180%
Separators
C = 1200 bbl/hr
U = 120%
Bulk and Bag
4
2
4/3/2012
Operations Management
Base Case
Inventory Buildup Diagram
7000
Truck Inventory
6000
Total Inventory
Wet Bin Inventory
Inventories
5000
4000
3000
2000
1000
0
7:00
9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00 1:00
3:00
5:00
7:00
Time
Base Case
5
Operations
Buildup Rate = 1080-600=480
bbl/hr