Insurance and Inventory Management Lecture Insights

 
Lecture 23 Inventory Management.xlsx
Lecture 23 Insurance.xlsx
 
 
Insurance and Inventory
Management Lecture 23
 
Insurance is a risk management tool
Buy insurance to cover a specific risk of a loss
to the business
Low yield due to fire, hail, drought, flood, etc.
Low prices
Low revenue due to low yield or price
Health, auto, and home insurance most popular
Liability insurance
Insurance transfers a part of the risk to a
third party for a fee
 
Principal of Insurance
 
States the risk to protect against
Conditions for a loss
Amount of loss that must occur for a payment
States the premium to be paid
States indemnity payment conditions
Amount of the deductible (losses not paid)
Formula for calculating a payment
 
 Terms for an Insurance Policy
 
Premiums are set to cover the expected loss
plus a risk premium (RP) and a profit for the
insurance company
Premium = Expected($Lose) + RP + Profit
Calculate the Expected($Lose) w/ simulation
Simulate the type of losses and use the losses in
the formula for calculating the premium
Calculate the average loss over a given time
period, usually a year for the “group”
Profit is a set fraction (e.g., 20%)
RP covers risk not fully captured in PDF for risk
 
Insurance Premiums
 
1930’s USDA offered yield insurance in the
Great Plains for wheat
Experimental project
Expanded to other crops gradually
1971 Farm program offered Disaster Program
Paid farmers for low yield and prevented
plantings; no premium was charged
Replaced with FCIC insurance in 1983
In ‘83 FCIC yield insurance expanded to all
crops in all counties
Congress eliminated the Low Yield Disaster Prog.
 
Brief History of Federal Crop Insurance
 
Crop Yield multi-peril insurance
Low yields insured against hail, fire, insects,
drought, flood
Revenue insurance
Protects crop farmers from low revenues relative
to their historical average revenue
The federal government through the USDA
FCIC (federal crop insurance corporation --
Risk Management Agency) provides crop and
revenue coverage policies for most crops and
pasture
 
 
Insurance for Agriculture
 
Agricultural risks widespread due to weather
affecting large regions when drought occurs
If a private insurance company covered all the
risk they would be wiped out
Solution was for the federal government to
back up these companies
USDA-Risk Management Agency (RMA) writes
insurance policies and sets premiums and terms
Private companies sell these policies
Re-sell most of the policies to RMA
Keeps the lower risk policies as an investment
 
Agriculture Insurance Presents Unique Problems
 
Very large (international) reinsurance companies,
such as:
Zurich Insurance Group AG
 Bermuda based Aspen Insurance Holdings Ltd.
Next layer of insurance companies actually
have a sales force that sells insurance policies
Farmers Mutual Hail Insurance Co., Rain and Hail,
AgriLogic, ARMtech Insurance
Cargill, John Deere, Wells Fargo recently exited
the business
Local insurance agents who meet with farmers
All companies belong to NCIS
 
Agriculture Insurance Industry
 
Some of the Major Crop
Insurance Companies
 
USDA-Risk Management Agency (RMA) is the
“reinsurance agent”
Insurance companies sell the policies that RMA
develops as well as their own
RMA will buy back the policies that it develops so
the insurance companies do not have to cover all
of the losses
Insurance companies face a portfolio problem:
Policies sold to RMA only earn a % of the premium
Policies they retain earn 100% of the premium if
there is no indemnity, there in lies the risk of which
policies to sell to RMA
 
Agriculture Insurance Industry
 
Compare Conditions for Two years
 
… but parts of Texas are still in an exceptional,
multi-year drought …
 
September 13, 2011
 
February 3, 2015
 
April 12, 2018 Drought Conditions
 
Production guarantee = APH * coverage level
percentage elected
APH = 10 year yield history on the farm unit
Based on actual yields for the farm unit
Farm unit can be a field or all fields (enterprise option)
Premium set by RMA based on announced price
guarantee, APH, county, and coverage level
percentage
Indemnity = Max[0, (Production Guarantee -
Actual Yield)]   *  (Announced Price *
Acreage Covered)
 
FCIC Yield Insurance (YP)
 
50 acres of corn, RMA projected/announced
price of $3.50/bu, APH yield 145 bu/acre,
85% coverage level
Production guarantee = 0.85 * 145 = 123.3
If 
actual yield is stochastic 
= 115
so lost yield = 123.3-115
Indemnity = (123.3-115) * 3.50 * 50
 
FCIC Yield Insurance
 
Crop Revenue Coverage (CRC)
Producers buy a fraction of historical revenue
Insured Revenue = APH * Announced Price * Fraction
Revenue fractions are: 50% to 85% in 5% deltas
Insure with a projected price or the harvest price
based on the futures contract
Indemnity = Max[0, (Guaranteed Revenue –
Actual Revenue) * Acres ]
Actual Revenue = 
actual yield
 * (RMA projected
price OR 
harvest time price
)
 
 
Revenue Insurance
 
50 acres of corn, RMA projected price of
$3.50/bu, APH yield 145 bu/acre, 85%
coverage level
Revenue guarantee = 50 * 145 * 0.85 * 3.50
Actual yield is stochastic 
= 100
Indemnity = Max[0, (revenue guarantee – 50
* 100 * {3.50 or 
actual harvest time price}
)]
Electing the RMA projected price is referred to
“Harvest Price Exclusion” and is cheaper
because the harvest price is generally lower
 
Revenue Insurance
 
This is a simple simulation problem
Simulate yield and price based on history
Compare yield or revenue to alternative
(insured) coverage levels, calculate
indemnities and premiums
Pay premiums every year
Collect indemnities only when there is a loss
Pick insurance policy which is best at reducing
risk and increasing net income, NPV, or cash
flows
 
Analyzing & Picking Best Insurance Option
 
General Policies and Provisions
 
    Actual Revenue History (ARH) Pilot Endorsement (14-arh).
    Area Risk Protection Insurance (14-ARPI)
        Commodity Exchange Price Provisions (CEPP)
        Catastrophic Risk Protection Footnote 5.
        Ineligibility Amendment (15-Ineligibility) Footnote 1.
        Farm Bill Amendment (15-ARPI-Farm-Bill) Footnote 6.
    Catastrophic Risk Protection Endorsement (15-cat). Footnote 3.
    Common Crop Insurance Policy, Basic Provisions (11-br)
        Commodity Exchange Price Provisions (CEPP)
        Contract Price Addendum (CPA)
        Ineligibility Amendment (15-Ineligibility) Footnote 1.
        Farm Bill Amendment (15-CCIP-Farm-Bill) Footnote 2.
        Other Information
        Supplemental Coverage Option (SCO-15)
    High-Risk Alternate Coverage Endorsement (HR-ACE)(13-HR-ACE)
        High-Risk Alternate Coverage Endorsement Standards Handbook
        High-Risk Alternate Coverage Endorsement Frequently Asked
Questions
    Livestock
    Quarantine Endorsement Pilot (11-qe).
    Rainfall and Vegetation Indices Pilot
    Whole-Farm Revenue Protection (WFRP) Pilot Policy
 
RMA Insurance Policies
 
Insurance policies must
be purchased prior to
planting to reduce:
Moral hazard -- buying
insurance when
farmers know the crop
will fail
xxx
 
2014 Farm Bill is relying more on insurance
and less on direct or indirect subsidies
Supplemental Crop Option (SCO)
STAX insurance for cotton lint
The 2018 farm bill could change the
insurance options and premium subsidies
So far the announcements are no change in
insurance from the House – The Senate is yet
to speak up
 
Insurance and Farm Policy
 
Sales representative for the large companies
Insurance actuary and analysts
Insurance adjusters
Seasonal employment that pays well
Work during growing season only
Visit damaged fields and prepare estimates of the
damages
Experience with crop production and economics
Insurance companies complain there never
enough adjusters
 
Insurance Job Opportunities
 
Insurance Use in Texas for Cotton
 
Insurance Use in Texas for Corn
 
A new business may need a few months
or years to grow sales to their potential
May take months or years to learn how
to reach potential for a production
function
In either case, assume a stochastic
growth function and simulate it, if
nothing else is available, use a Uniform
distribution
Example of a growth function for 8
years
 
Simulating a Learning Curve to
Represent the Demand Cycle
 
Learning Curve or Demand Cycle
 
A new concept in project feasibility
analysis
Explicitly consider externalities
Such as cleanup costs at the end of the
business
Strip mining reclamation
Removal of underground fuel tanks
Removal of above ground assets
Restoration of site
Prevention of future environmental hazards
Removal of waste materials
100 year liners for ponds
 
Life Cycle Costing
 
Steps to Life Cycle Costing Analysis
Identify the potential externalities
Determine costs of these externalities
Assign probabilities to the chance of
experiencing each potential cost
Assume distributions with GRKS or Bernoulli
Simulate costs given the probabilities
Incorporate costs of cleanup and
prevention into the project feasibility
These terminal costs may have big Black
Swans so prepare the investor
 
Life Cycle Costing
 
Bottom line is that LCC will increase the costs
of a project and reduce its feasibility
Affects the downside risk on returns
Does nothing to increase the positive returns
Need to consider the FULL costs of a
proposed project to make the correct decision
J. Emblemsvag – 
Life Cycle-Costing: Using Activity-Based
Costing and Monte Carlo Simulation to manage Future Costs
and Risks
 
John Wiley & Sons Inc. 2003
 
Life Cycle Costing
 
LCA is a tool for determining the impact
of a new process or project on the
environment and climate change
LCAs are concerned with quantifying
Energy Use and CO
2 
 Balance
Green House Gases (GHGs)
Water use and indirect Land use
Nutrient (N,P,K) use and other factors
Thus far these are deterministic
analyses – This will soon change
 
Life Cycle Analysis
 
For those interested in a good example
of LCA see
 
MS thesis in our Department by Chris Rutland
 
Analyzed the carbon footprint for crop and dairy
 
farms in principal production regions in the US
GREET Model developed by Dept. of Energy
engineers at Argonne National Labs
Download it and use it for free
Contains NO risk variables
 
Life Cycle Analysis
 
Inventory management is about
When to re-order
How much to order
Factors to consider
Cost of storage
Cost of placing an order
Cost of lost sales due to shortage
Stochastic demand
Delivery time from time order is placed
Can you backlog demand
 
 
 
 
Inventory Management
 
Simulate the inventory management
problem as a stochastic problem
Simulate N periods to test impacts of
alternative inventory management
schemes
Period -- length of time for the problem –
week, month
Based on the time period for the demand data
Also based on order/delivery time
 
Inventory Management
 
Example of a weekly Inv. Management Problem
Cost to place an order $200
Cost of a unit purchased $4
Cost of storage for 1 week $3
Cost of each lost sale $10
Price of product sold $25
Weekly demand PDF ~ N(40,6)
2 week delivery time; could be stochastic
Beginning inventory 100
Inventory management rule to test:
Place order if inventory on hand <= 50 units
Amount to order = 150 minus the inventory on hand
KOV = average weekly profit, cost, inventory, revenue
 
 
Inventory Management
 
Rules for Simulating Inventory
 
Demand
t
 is stochastic
Beginning inventory
t 
= ending inventory
t-1
Supply
t
 = beginning inventory
t
 + quantity
received
t
Sales
t
 = Minimum (demand
t
 or supply
t
)
Ending Inventory
t 
= supply
t
 – sales
t
Quantity received
t
 = quantity ordered
t-n
if it takes “n” periods for the delivery
Could have a stochastic under shipment factor
   Lost sales
t 
= 0.0  If(supply
t 
> demand
t
)
else Lost sales
t
 = demand
t 
– supply
t
 
 
Calculating Inventory Costs
 
Purchase costs
t
 = cost per unit paid for
product
Order costs
t 
= fixed cost to place an order
(shipping costs, office expense, delivery
processing costs, Fed Ex rush delivery fee,
etc.)
Storage costs
t 
= cost per unit * beginning
inventory
t
Penalty costs
t 
= cost to the business for lost
sales 
 
or
 
lost sales
t 
* cost for perceived lost goodwill
 
 
Inventory Management Model
 
  The model should have 40 to 50 weeks so the startup conditions do not dictate the
results for the inventory management rule being analyzed
 
Test alternative reorder points
Should firm reorder when inventory < 50?
Scenarios: 40, 50, 60, 70, 80, 90 for the reorder point
Order up to some amount
Should firm reorder a larger amount
Scenarios: 140, 150, 160, 170, 190, or more
Would it be more profitable to pay more (or less)
to get the order delivered faster (slower)?
Pay $300/order to get delivery in 1 week
Pay $100/order to get delivery in 3 weeks
The profit PDF changes for each question; use
simulation to estimate the profit PDF for each
scenario
 
Inventory Management Scenarios
 
Inventory Management.XLS
 
Scenario reorder points of:  50, 60, 70, 80, 90
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Explore the fundamentals of insurance with a focus on risk management and insurance policies, premiums, and a brief history of federal crop insurance. Discover how insurance plays a crucial role in mitigating losses and protecting businesses from various risks, including low yields, natural disasters, and revenue fluctuations in agriculture. Gain insights into the mechanisms behind calculating insurance premiums and the evolution of crop insurance in the United States.

  • Insurance Management
  • Risk Management
  • Crop Insurance
  • Inventory Management
  • Agriculture

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  1. Insurance and Inventory Management Lecture 23 Lecture 23 Inventory Management.xlsx Lecture 23 Insurance.xlsx

  2. Principal of Insurance Insurance is a risk management tool Buy insurance to cover a specific risk of a loss to the business Low yield due to fire, hail, drought, flood, etc. Low prices Low revenue due to low yield or price Health, auto, and home insurance most popular Liability insurance Insurance transfers a part of the risk to a third party for a fee

  3. Terms for an Insurance Policy States the risk to protect against Conditions for a loss Amount of loss that must occur for a payment States the premium to be paid States indemnity payment conditions Amount of the deductible (losses not paid) Formula for calculating a payment

  4. Insurance Premiums Premiums are set to cover the expected loss plus a risk premium (RP) and a profit for the insurance company Premium = Expected($Lose) + RP + Profit Calculate the Expected($Lose) w/ simulation Simulate the type of losses and use the losses in the formula for calculating the premium Calculate the average loss over a given time period, usually a year for the group Profit is a set fraction (e.g., 20%) RP covers risk not fully captured in PDF for risk

  5. Brief History of Federal Crop Insurance 1930 s USDA offered yield insurance in the Great Plains for wheat Experimental project Expanded to other crops gradually 1971 Farm program offered Disaster Program Paid farmers for low yield and prevented plantings; no premium was charged Replaced with FCIC insurance in 1983 In 83 FCIC yield insurance expanded to all crops in all counties Congress eliminated the Low Yield Disaster Prog.

  6. Insurance for Agriculture Crop Yield multi-peril insurance Low yields insured against hail, fire, insects, drought, flood Revenue insurance Protects crop farmers from low revenues relative to their historical average revenue The federal government through the USDA FCIC (federal crop insurance corporation -- Risk Management Agency) provides crop and revenue coverage policies for most crops and pasture

  7. Agriculture Insurance Presents Unique Problems Agricultural risks widespread due to weather affecting large regions when drought occurs If a private insurance company covered all the risk they would be wiped out Solution was for the federal government to back up these companies USDA-Risk Management Agency (RMA) writes insurance policies and sets premiums and terms Private companies sell these policies Re-sell most of the policies to RMA Keeps the lower risk policies as an investment

  8. Agriculture Insurance Industry Very large (international) reinsurance companies, such as: Zurich Insurance Group AG Bermuda based Aspen Insurance Holdings Ltd. Next layer of insurance companies actually have a sales force that sells insurance policies Farmers Mutual Hail Insurance Co., Rain and Hail, AgriLogic, ARMtech Insurance Cargill, John Deere, Wells Fargo recently exited the business Local insurance agents who meet with farmers All companies belong to NCIS

  9. Some of the Major Crop Insurance Companies

  10. Agriculture Insurance Industry USDA-Risk Management Agency (RMA) is the reinsurance agent Insurance companies sell the policies that RMA develops as well as their own RMA will buy back the policies that it develops so the insurance companies do not have to cover all of the losses Insurance companies face a portfolio problem: Policies sold to RMA only earn a % of the premium Policies they retain earn 100% of the premium if there is no indemnity, there in lies the risk of which policies to sell to RMA

  11. Compare Conditions for Two years September 13, 2011 February 3, 2015 but parts of Texas are still in an exceptional, multi-year drought

  12. April 12, 2018 Drought Conditions

  13. FCIC Yield Insurance (YP) Production guarantee = APH * coverage level percentage elected APH = 10 year yield history on the farm unit Based on actual yields for the farm unit Farm unit can be a field or all fields (enterprise option) Premium set by RMA based on announced price guarantee, APH, county, and coverage level percentage Indemnity = Max[0, (Production Guarantee - Actual Yield)] * (Announced Price * Acreage Covered)

  14. FCIC Yield Insurance 50 acres of corn, RMA projected/announced price of $3.50/bu, APH yield 145 bu/acre, 85% coverage level Production guarantee = 0.85 * 145 = 123.3 If actual yield is stochastic = 115 so lost yield = 123.3-115 Indemnity = (123.3-115) * 3.50 * 50

  15. Revenue Insurance Crop Revenue Coverage (CRC) Producers buy a fraction of historical revenue Insured Revenue = APH * Announced Price * Fraction Revenue fractions are: 50% to 85% in 5% deltas Insure with a projected price or the harvest price based on the futures contract Indemnity = Max[0, (Guaranteed Revenue Actual Revenue) * Acres ] Actual Revenue = actual yield * (RMA projected price OR harvest time price)

  16. Revenue Insurance 50 acres of corn, RMA projected price of $3.50/bu, APH yield 145 bu/acre, 85% coverage level Revenue guarantee = 50 * 145 * 0.85 * 3.50 Actual yield is stochastic = 100 Indemnity = Max[0, (revenue guarantee 50 * 100 * {3.50 or actual harvest time price})] Electing the RMA projected price is referred to Harvest Price Exclusion and is cheaper because the harvest price is generally lower

  17. Analyzing & Picking Best Insurance Option This is a simple simulation problem Simulate yield and price based on history Compare yield or revenue to alternative (insured) coverage levels, calculate indemnities and premiums Pay premiums every year Collect indemnities only when there is a loss Pick insurance policy which is best at reducing risk and increasing net income, NPV, or cash flows

  18. RMA Insurance Policies General Policies and Provisions Insurance policies must be purchased prior to planting to reduce: Moral hazard -- buying insurance when farmers know the crop will fail xxx Actual Revenue History (ARH) Pilot Endorsement (14-arh). Area Risk Protection Insurance (14-ARPI) Commodity Exchange Price Provisions (CEPP) Catastrophic Risk Protection Footnote 5. Ineligibility Amendment (15-Ineligibility) Footnote 1. Farm Bill Amendment (15-ARPI-Farm-Bill) Footnote 6. Catastrophic Risk Protection Endorsement (15-cat). Footnote 3. Common Crop Insurance Policy, Basic Provisions (11-br) Commodity Exchange Price Provisions (CEPP) Contract Price Addendum (CPA) Ineligibility Amendment (15-Ineligibility) Footnote 1. Farm Bill Amendment (15-CCIP-Farm-Bill) Footnote 2. Other Information Supplemental Coverage Option (SCO-15) High-Risk Alternate Coverage Endorsement (HR-ACE)(13-HR-ACE) High-Risk Alternate Coverage Endorsement Standards Handbook High-Risk Alternate Coverage Endorsement Frequently Asked Questions Livestock Quarantine Endorsement Pilot (11-qe). Rainfall and Vegetation Indices Pilot Whole-Farm Revenue Protection (WFRP) Pilot Policy

  19. Insurance and Farm Policy 2014 Farm Bill is relying more on insurance and less on direct or indirect subsidies Supplemental Crop Option (SCO) STAX insurance for cotton lint The 2018 farm bill could change the insurance options and premium subsidies So far the announcements are no change in insurance from the House The Senate is yet to speak up

  20. Insurance Job Opportunities Sales representative for the large companies Insurance actuary and analysts Insurance adjusters Seasonal employment that pays well Work during growing season only Visit damaged fields and prepare estimates of the damages Experience with crop production and economics Insurance companies complain there never enough adjusters

  21. Insurance Use in Texas for Cotton 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 410,813 138,146 2,384,361 2,035,135 4,472,480 9,831,329 508,302 15,533 Acres of Cotton Participating in Crop Insurance in TX by Coverage Level 12,000,000 10,000,000 240 650 8,000,000 23249 4146 113 6,000,000 4,000,000 14 465 105 2,000,000 4 - 170 387 44 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85

  22. Insurance Use in Texas for Corn 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 147,477 Acres of Corn Participating in Crop Insurance in TX by Coverage Level 17,136 210,009 304,214 716,190 1,035,911 200,897 52,649 1,200,000 1,000,000 800,000 600,000 400,000 200,000 SUM - 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85

  23. Simulating a Learning Curve to Represent the Demand Cycle A new business may need a few months or years to grow sales to their potential May take months or years to learn how to reach potential for a production function In either case, assume a stochastic growth function and simulate it, if nothing else is available, use a Uniform distribution Example of a growth function for 8 years

  24. Learning Curve or Demand Cycle Fan Graph for Realized Sales over 10 Years 250,000 200,000 150,000 100,000 50,000 - Sales1 Sales3 Sales5 5th Percentile 95th Percentile Sales7 Sales9 25th Percentile Average 75th Percentile

  25. Life Cycle Costing A new concept in project feasibility analysis Explicitly consider externalities Such as cleanup costs at the end of the business Strip mining reclamation Removal of underground fuel tanks Removal of above ground assets Restoration of site Prevention of future environmental hazards Removal of waste materials 100 year liners for ponds

  26. Life Cycle Costing Steps to Life Cycle Costing Analysis Identify the potential externalities Determine costs of these externalities Assign probabilities to the chance of experiencing each potential cost Assume distributions with GRKS or Bernoulli Simulate costs given the probabilities Incorporate costs of cleanup and prevention into the project feasibility These terminal costs may have big Black Swans so prepare the investor

  27. Life Cycle Costing Bottom line is that LCC will increase the costs of a project and reduce its feasibility Affects the downside risk on returns Does nothing to increase the positive returns Need to consider the FULL costs of a proposed project to make the correct decision J. Emblemsvag Life Cycle-Costing: Using Activity-Based Costing and Monte Carlo Simulation to manage Future Costs and RisksJohn Wiley & Sons Inc. 2003

  28. Life Cycle Analysis LCA is a tool for determining the impact of a new process or project on the environment and climate change LCAs are concerned with quantifying Energy Use and CO2 Balance Green House Gases (GHGs) Water use and indirect Land use Nutrient (N,P,K) use and other factors Thus far these are deterministic analyses This will soon change

  29. Life Cycle Analysis For those interested in a good example of LCA see MS thesis in our Department by Chris Rutland Analyzed the carbon footprint for crop and dairy farms in principal production regions in the US GREET Model developed by Dept. of Energy engineers at Argonne National Labs Download it and use it for free Contains NO risk variables

  30. Inventory Management Inventory management is about When to re-order How much to order Factors to consider Cost of storage Cost of placing an order Cost of lost sales due to shortage Stochastic demand Delivery time from time order is placed Can you backlog demand

  31. Inventory Management Simulate the inventory management problem as a stochastic problem Simulate N periods to test impacts of alternative inventory management schemes Period -- length of time for the problem week, month Based on the time period for the demand data Also based on order/delivery time

  32. Inventory Management Example of a weekly Inv. Management Problem Cost to place an order $200 Cost of a unit purchased $4 Cost of storage for 1 week $3 Cost of each lost sale $10 Price of product sold $25 Weekly demand PDF ~ N(40,6) 2 week delivery time; could be stochastic Beginning inventory 100 Inventory management rule to test: Place order if inventory on hand <= 50 units Amount to order = 150 minus the inventory on hand KOV = average weekly profit, cost, inventory, revenue

  33. Rules for Simulating Inventory Demandt is stochastic Beginning inventoryt = ending inventoryt-1 Supplyt = beginning inventoryt + quantity receivedt Salest = Minimum (demandt or supplyt) Ending Inventoryt = supplyt salest Quantity receivedt = quantity orderedt-n if it takes n periods for the delivery Could have a stochastic under shipment factor Lost salest = 0.0 If(supplyt > demandt) else Lost salest = demandt supplyt

  34. Calculating Inventory Costs Purchase costst = cost per unit paid for product Order costst = fixed cost to place an order (shipping costs, office expense, delivery processing costs, Fed Ex rush delivery fee, etc.) Storage costst = cost per unit * beginning inventoryt Penalty costst = cost to the business for lost sales or lost salest * cost for perceived lost goodwill

  35. Inventory Management Model Week Beginning inventory Quantity Ordered Quantity Received Supply Demand Sales Ending Inventory Lost Sales 1 2 3 0 4 0 100 60 0 0 0 0 150 150 150 150 50 50 100 0 0 100 40 40 60 60 70 60 30 0 0 0 0 10 30 0 Costs Storage Order Purchase Penalty TOTAL 300 180 0 0 0 0 0 0 0 200 600 300 1100 200 600 100 280 0 300 800 Revenue Profit 900 600 1350 1070 0 1125 325 -1100 The model should have 40 to 50 weeks so the startup conditions do not dictate the results for the inventory management rule being analyzed

  36. Inventory Management Scenarios Test alternative reorder points Should firm reorder when inventory < 50? Scenarios: 40, 50, 60, 70, 80, 90 for the reorder point Order up to some amount Should firm reorder a larger amount Scenarios: 140, 150, 160, 170, 190, or more Would it be more profitable to pay more (or less) to get the order delivered faster (slower)? Pay $300/order to get delivery in 1 week Pay $100/order to get delivery in 3 weeks The profit PDF changes for each question; use simulation to estimate the profit PDF for each scenario

  37. Inventory Management.XLS Scenario reorder points of: 50, 60, 70, 80, 90 Stochastic Efficiency with Respect to A Function (SERF) Under a Power Utility Function 380 370 Profit: 2 360 Profit: 3 Profit: 1 350 340 330 Profit: 4 320 Profit: 5 310 0 0.00001 0.00002 0.00003 0.00004 0.00005 RRAC Profit: 1 Profit: 2 Profit: 3 Profit: 4 Profit: 5

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