The Community FoodBank of New Jersey
Supermarket Donation Program
Case Studies in Operations Research
Prof. Michael Rothkopf
Namrata Bedi
Konrad Borys
Hambir Chavan
Nadia Farooq
Indira Gazula
Nithin Kotla
Gabor Rudolf
Jose Torres
Objective
• Give Projections for:
–
–
–
–
–
Required number of truck outings
Total amount of meat collected
Average number of pallets in truck per trip
Total cost of pickup schemes
Unit cost of meat per pound of the pickup schemes
• Develop a cost efficient routing and scheduling
strategy for the collection of donated products
for the Stop & Shop Chain
Pilot Program
• Stop & Shop stores participating
– Dayton, Monmouth Junction, Franklin Park,
Somerset and Watchung
• April 19, 23, 27, 30
• Time window for Pickups: 10am and 2pm
Pilot Program Route
Pilot Program in Pictures
Data Collected
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•
•
•
Quantity of food collected
Travel time
Loading time
Fuel consumption
Observations
• Average time spent at each store was 36 min
– Due to food inspections
– Should lower to 15 to 20 min/store
• The actual travel time is about 40% greater than that
estimated from Mapquest.
• Breaks during the pickup time window caused
inconvenience.
• Unfrozen food at certain locations indicates possible
drawbacks of longer interval between pickups.
Clusters and Routing for Stop & Shop
Projections with Weekly Pickups
Stop &
Shop
Meat/Week
Lbs
Total Cost
$
Unit Cost
Cents
Number of
Truck
Outings
12,000
1000
8.3
7
40,000
3000
7.3
25
80,000
5000
6.4
45
3 Chains
Stop & Shop
Wegmans
Shoprite
5 Chains
Stop & Shop
Wegmans
Shoprite
Pathmark
A&P
Pickups
Biweekly Vs Weekly
• PROS
– Lower operational costs
– Higher utilization of
space on trucks
– Reduces Total cost by
about 50%
– Reduces Unit cost of by
35% to 45%
• CONS
– Possible loss of food due
to improper collection
methods
– Inconvenience due to lack
of storage space
–
Reduces total food
collected by 10% to 20%
Factors affecting Unit Cost
• Time Window for Pickups
Factors Affecting Unit Cost
• A 30 Min lunch break increases cost by
approximately 10% and the number of truck
outings by 12%.
Questions & Comments
[email protected]
Scale Up Model
• Divided NJ into 7 sections
• Assumed that density of stores remains the same as in
Middlesex county
• Calculated the average time between two stores while
considering
– Stop&Shop
– 3 chains(Stop&Shop,Shoprite,Wegmans)
– 5chains(Stop&Shop,Shoprite,Wegmans,Pathmark,A&P)
• nj