Data-driven optimization of OFDA’s
disaster response capacity
Phase II – Workshop III
© 2020 MIT Center for Transportation & Logistics | Page 2
Agenda
• Recap
• Target beneficiaries and OFDA’s mandate
• Inventory optimization
• Recommendations
• Discussion
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Beneficiaries served vs target TAP
18 Sample size 1 16 8 31 21
Cap based on current ops
Recap
➢ We created a function to scale TAP to a target TAP using past service rates.
➢ Considering current inventory levels, the resulting disaster portfolio is featuring relatively high
targeted TAP, resulting in rather low service rates, and consolidated inventory allocations.
➢ Using the current inventory distribution in the network, we scaled the target TAP down with a “flat” cap on all disasters.
➢ To have a diversified network as in OFDA’s current operational footprint and at current inventory levels, the results of our modelling suggests that OFDA seeks to meet a disaster portfolio with lower target TAP!
Served with current inventory Max cap
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Disaster portfolio scenarios
18 Sample size 1 16 8 31 21
Cap based on current ops
Suggested analysis
➢ To develop inventory allocation recommendations, we create product-specific disaster-portfolio
scenarios.
➢ Comparing the resulting inventory allocation
recommendations and service metrics will provide OFDA with options to consider.
➢ In the following we focus our analysis on hygiene kits to showcase how it works.
Served with current inventory Max cap
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A three-step process
• Optimize the current inventory level
• Determine performance against different mandates • Decide if inventory levels
have to be adjusted • Collect past disaster
information.
• Create OFDA’s risk portfolio with target beneficiaries • Create scenarios, i.e. vary
OFDA’s mandate
• Define objective
• Adjust inventory levels • Identify optimal allocation • Recommend actions
OFDA’s mandate Inventory optimization Recommendations
Step 1: OFDA’s mandate
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Disaster portfolio and OFDA’s mandate
• Disaster responses in the past
• TAP and location • Adjust TAP according to OFDA’s disaster response activities • Use past activities to estimate
mandate
Disasters OFDA’s responses in the past Risk portfolios: hygiene kits
Medium-Large Large
Small-Medium Current Small
• Creating different item-specific scenarios = OFDA’s future mandate • Characterize different exposure to
disaster sizes 30,000 3,200 60,000 9,400 130,000 29,700 Small Small -Med . Lar ge Mean Std. Dev. 100,000 23,900 Med . -Lar ge 80,000 Current 14,800
Step 2: Inventory optimization
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Metrics – current mandate
Balance metric
Inventory allocation
80 - 100%
0 - 2
Results
• Reallocating inventory benefits OFDA • Response time reduction: 3% • Cost reduction: 5%
• 69% of beneficiaries served
• 93% of all disaster scenarios served
➢ Current inventory levels result in mixed service levels.
➢ Current inventory allocation is close to optimum. 97% 69% 93% 1.1 - 3% - 5% 16.0h $13,800 Medium-Large Large Small-Medium Current Small
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Metrics – large mandate
Balance metric
Inventory allocation
80 - 100%
0 - 2
Results
• Reallocating inventory benefits OFDA • Response time reduction: 11% • Cost reduction: 17%
• 54% of beneficiaries served
• 79% of all disaster scenarios served
➢ Current inventory levels result in lower service and strong consolidation.
89% 54% 79% 1.73 - 11% - 17% 16.5h $14,500 Medium-Large Large Small-Medium Current Small
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Metrics – small mandate
Balance metric
Inventory allocation
80 - 100%
0 - 2
Results
• Reallocating inventory benefits OFDA • Response time reduction: 2% • Cost reduction: 3%
• 94% of beneficiaries served
• 99% of all disaster scenarios served
- 2% - 3% 14.5h 98% 94% 99% 0.33 $11,800
➢ Current inventory is sufficient to run a diversified response network effectively.
Medium-Large Large
Small-Medium Current Small
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Metrics – comparing mandates
Balance metric Inventory allocation 80 - 100% 0 - 2 Medium-Large Results
• At current inventory levels, with increasing mandates the inventory allocation should be consolidated more.
• Service levels drop.
• Cost and lead time increase.
➢ Which mandate is capturing OFDA’s future activities appropriately?
Large Small-Medium Current
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Inventory allocation
Today Small Small-Med Current Med-High High
Inv. Allocation Metric 1.1 0.3 1.0 1.1 1.4 1.7 Dubai, UAE 15,000 8,831 12,400 17,000 21,000 25,000 Miami, USA 10,000 7,000 12,400 8,000 4,000 0 Pisa, Italy 0 6,000 200 0 0 0 Subang, Malaysia 0 3,168 0 0 0 0
• A larger mandate means that OFDA expects to serve more beneficiaries in each disaster and the variation of beneficiaries increases. • At current inventory levels OFDA should
consider to consolidate the inventory if they expect a larger mandate.
Results
Medium-Large Large
Small-Medium Current Small
Step 3: Recommendations
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Inventory decision to fit OFDA’s mandate
Medium-Large
Problem
• OFDA seeks to serve the medium-large mandate. • The rather low service (% TAP served) is of
concern.
• Strong inventory consolidation resulting in higher response times and higher cost, are not
acceptable.
➢ Increasing total number of hygiene kits inventory can address these concerns.
➢ How much inventory should OFDA hold, and where should they locate it?
Large Small-Medium Current
Small
1. Set a target, e.g. min. 85% service level 2. Evaluate inventory scenarios
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Inventory and its allocation to increase service
85%
56k
Current inventory level
+ 100%
64%
37%
26% 37%
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Results of increased inventory
Balance metric*
Inventory allocation
80 - 100%
0 - 2
Medium-Large @ Current Inv.
OFDA’s optimized network
• Approximately doubling hygiene kits
inventory allows OFDA to increase service level to 85%.
• Because OFDA can choose a diversified
network, response times drop by up to 15%. • Cost can be reduced by up to 12%.
Medium-Large @ Higher Inv. Current 85% 85% 15h $12,600 97% 0.61
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Summary
• By exploring different disaster risk scenarios, OFDA can
explore various mandates.
• Various scenarios allow OFDA to discuss future
mandates, and what service levels they would achieve
with current inventory.
• Evaluating varying inventory levels, then enables OFDA
to choose appropriate service levels, cost, and response
times.
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