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North Texas Food Bank

North Texas Food Bank. Passionately pursuing a hunger-free community. Senior Design 2009 Allison Griffin Megan Walker Pragya Lohani. Background. Current Agency Pick-ups process at NTFB First come, First Serve Multiple agency orders being loaded at the same time

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North Texas Food Bank

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  1. North Texas Food Bank Passionately pursuing a hunger-free community Senior Design 2009 Allison Griffin Megan Walker Pragya Lohani

  2. Background • Current Agency Pick-ups process at NTFB • First come, First Serve • Multiple agency orders being loaded at the same time • Increased wait time, disorganization, agency frustration • Use of one dock • 5 docks available • Use of one fork lift for loading • More than one fork lift available • Frozen item palettes created once agency arrives • Increased wait time • Pick-n-Weigh

  3. P & W Sign - In X X X X X

  4. Analysis of the Situation • Flow charts • Navisions • Amount of food ordered in lbs • Pick and Weigh • Calculation of different metrics – Actual Observations • Amount of food loaded/min • Total time taken for the entire process • Time taken for each sub-process • Forecasting of P&W lbs • Divided agencies into categories depending on their P&W order for the year

  5. P & W Sign - In X X

  6. Creating the Model • Inputs • Timeslots required per agency • Number of Days and Preferences • Number of Docks and Preferences • Agency Day Preferences • Patterns • Generates timeslot options • Bounded by largest agency requirement • Incompatible patterns calculated

  7. More About the Model • Constraints • Assigns one agency per timeslot, dock, and day • Objective Function • Cost on patterns • Cost on docks • Cost on days • Agency Preferences

  8. Example Model I • Constraints • Distribution Center open for 3 days • # of Docks open : 2 • Open : 7 ½ hours • NTFB preference given to Day 1

  9. Output 1

  10. Model Output 2 • NTFB has no preference for any of the 3 days • Constraints • Distribution Center open for 3 days • # Docks : 2 • Open : 7 ½ hours

  11. Model Output 2

  12. Another variation of the Model • NTFB has preference for the first day • Constraints • Distribution Center open for 3 days • # Docks : 4 • Open : 5 hours Day 1 • 1 ½ hours Day 2 and 3

  13. Model Output

  14. Recommendations • Consider a new Inventory System • Navisions is not advanced enough for statistical analysis • Use of AMPL Model • Open up more docks if number of agencies in a given week is large • Have preferences given to a certain day or dock • Preferences of agencies taken into account • Having equal preferences divides agencies equally • Work load balance for the workers • Schedule of Agencies • Allows time for frozen items to be prepared when an agency is in P & W • Look into another model that could use this model / concept

  15. End Results Weekly Schedule of Agency Pick-Ups Streamlined Process Happy Workers and Agencies Distribution increased by over 1 million pounds in the month of July

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