Supply Chain
Management
(SCM)
Presented by : Amir Ahmed , CSCP
Supply Chain Management
Definition:
Supply Chain Management is primarily concerned with the
efficient integration of suppliers, factories, warehouses and
stores so that merchandise is produced and distributed in the
right quantities, to the right locations and at the right time, and
so as to minimize total system cost subject to satisfying service
level requirements.
Notice:
Everyone is involved
Systems approach to reducing costs
Integration is the key
Value vs. Supply Chain
Value chain
every step from raw materials to the eventual end user
ultimate goal is delivery of maximum value to the end
user
Supply chain
activities that get raw materials and subassemblies into
manufacturing operation
Terms are used interchangeably
Supply Chain Management
Managing flow of information through supply
chain in order to attain the level of
synchronization that will make it more responsive
to customer needs while lowering costs
Keys to effective SCM
information
communication
cooperation
trust
Why Is SCM Difficult?
Uncertainty is inherent to every supply chain
Travel times
Breakdowns of machines and vehicles
Weather, natural catastrophe, war
Local politics, labor conditions, border issues
The complexity of the problem to globally optimize a supply
chain is significant
Minimize internal costs
Minimize uncertainty
Deal with remaining uncertainty
Supply Chain Uncertainty
One goal in SCM:
respond to uncertainty in
customer demand without
creating costly excess
inventory
Negative effects of
uncertainty
lateness
incomplete orders
Factors that contribute to
uncertainty
inaccurate demand forecasting
long variable lead times
late deliveries
incomplete shipments
product changes batch ordering
price fluctuations and discounts
inflated orders
Bullwhip Effect
Occurs when slight demand variability is magnified as information moves
back upstream
Factors Contributing to the Bullwhip
Demand forecasting practices
Min-max inventory management (reorder points to bring
inventory up to predicted levels)
Lead time
Longer lead times lead to greater variability in estimates of
average demand, thus increasing variability and safety stock
costs
Batch ordering
Peaks and valleys in orders
Fixed ordering costs
Impact of transportation costs (e.g., fuel costs)
Sales quotas
Price fluctuations
Promotion and discount policies
Lack of centralized information
Today’s Marketplace Requires:
Collaborative planning with design partners,
distributors, and suppliers
Real-time commitments for design, production,
inventory, and transportation capacity
Flexible logistics options to ensure timely fulfillment
Shared visibility for
trading partners
Supply Chain Management – Key Issues
Forecasts are never right
Very unlikely that actual demand will exactly equal forecast demand
The longer the forecast horizon, the worse the forecast
A forecast for a year from now will never be as accurate as a forecast
for 3 months from now
Aggregate forecasts are more accurate
A demand forecast for all CV therapeutics will be more accurate than
a forecast for a specific CV-related product
Supply Chain Management – Key Issues
Overcoming functional silos with conflicting goals
Purchasing Manufacturing Distribution
Customer Service/
Sales
Few change-
overs
Stable
schedules
Long run
lengths
High
inventories
High service
levels
Regional
stocks
SOURCE MAKE DELIVER SELL
Low pur-
chase price
Multiple
vendors
Low
invent-
ories
Low trans-
portation
Information In The Supply Chain
Each facility further away from
actual customer demand must
make forecasts of demand
Lacking actual customer buying
data, each facility bases its
forecasts on ‘downstream’
orders, which are more variable
than actual demand
To accommodate variability,
inventory levels are overstocked
thus increasing inventory
carrying costs
Source Make Deliver Sell
Suppliers Manufacturers
Warehouses &
Distribution Centers
Retailer
Order Lead Time
Delivery Lead Time
Production Lead Time
It’s estimated that the
typical pharmaceutical
company supply chain
carries over 100 days
of product to
accommodate
uncertainty
Plan
Taming the Bullwhip
Reduce uncertainty in the supply chain
Centralize demand information
Keep each stage of the supply chain provided with up-to-date
customer demand information
More frequent planning (continuous real-time planning the
goal)
Reduce variability in the supply chain
Every-day-low-price strategies for stable demand patterns
Reduce lead times
Use cross-docking to reduce order lead times
Use EDI techniques to reduce information lead times
Eliminate the bullwhip through strategic partnerships
Vendor-managed inventory (VMI)
Collaborative planning, forecasting and replenishment
(CPFR)
Four critical methods for reducing the Bullwhip effect:
Supply Chain Integration – Push Strategies
Classical manufacturing supply chain strategy
Manufacturing forecasts are long-range
Orders from retailers’ warehouses
Longer response time to react to marketplace changes
Unable to meet changing demand patterns
Supply chain inventory becomes obsolete as demand for
certain products disappears
Increased variability (Bullwhip effect) leading to:
Large inventory safety stocks
Larger and more variably sized production batches
Unacceptable service levels
Inventory obsolescence
Inefficient use of production facilities (factories)
How is demand determined? Peak? Average?
How is transportation capacity determined?
Examples: Auto industry, large appliances, others?
Supply Chain Integration – Pull Strategies
Production and distribution are demand-driven
Coordinated with true customer demand
None or little inventory held
Only in response to specific orders
Fast information flow mechanisms
POS data
Decreased lead times
Decreased retailer inventory
Decreased variability in the supply chain and especially at
manufacturers
Decreased manufacturer inventory
More efficient use of resources
More difficult to take advantage of scale opportunities
Examples: Dell, Amazon
Supply Chain Integration – Push/Pull Strategies
Hybrid of “push” and “pull” strategies to overcome disadvantages
of each
Early stages of product assembly are done in a “push” manner
Partial assembly of product based on aggregate demand forecasts
(which are more accurate than individual product demand
forecasts)
Uncertainty is reduced so safety stock inventory is lower
Final product assembly is done based on customer demand for
specific product configurations
Supply chain timeline determines “push-pull boundary”
Supply Chain Timeline
Raw
Materials
End
Consumer
Push Strategy Pull Strategy
Push-
Pull
Boundary
“Generic” Product “Customized” Product
Choosing Between Push/Pull Strategies
Where do the following
industries fit in this
model:
Automobile?
Aircraft?
Fashion?
Petroleum refining?
Pharmaceuticals?
Biotechnology?
Medical Devices?
Pull
Push
Pull
Push
Economies of Scale
Low High
Low
High
Demand Uncertainty
Industries where:
• Customization is High
• Demand is uncertain
• Scale economies are Low
Computer
equipment
Industries where:
• Standard processes are the
norm
• Demand is stable
• Scale economies are High
Grocery,
Beverages
Industries where:
• Uncertainty is low
• Low economies of scale
• Push-pull supply chain
Books, CD’s
Industries where:
• Demand is uncertain
• Scale economies are High
• Low economies of scale
Furniture
Conflicting Objectives
in the Supply Chain
1. Purchasing
• Stable volume requirements
• Flexible delivery time
• Little variation in mix
• Large quantities
2. Manufacturing
• Long run production
• High quality
• High productivity
• Low production cost
Conflicting Objectives
in the Supply Chain
3. Warehousing
• Low inventory
• Reduced transportation costs
• Quick replenishment capability
4. Customers
• Short order lead time
• High in stock
• Enormous variety of products
• Low prices
Supply Chain Integration
Information sharing among supply chain members
Reduced bullwhip effect
Early problem detection
Faster response
Builds trust and confidence
Collaborative planning, forecasting, replenishment,
and design
Reduced bullwhip effect
Lower Costs (material, logistics, operating, etc.)
Higher capacity utilization
Improved customer service levels
Supply Chain Integration (cont.)
Coordinated workflow, production and
operations, procurement
Production efficiencies
Fast response
Improved service
Quicker to market
Adopt new business models and technologies
Penetration of new markets
Creation of new products
Improved efficiency
Mass customization
Collaborative Planning, Forecasting, and
Replenishment
Process for two or more companies in a
supply chain to synchronize their demand
forecasts into a single plan to meet
customer demand
Parties electronically exchange
past sales trends
point-of-sale data
on-hand inventory
scheduled promotions
forecasts
Source: Adapted from Garrison Wieland for “Wal-Mart’s
Supply Chain,” Harvard Business Review 70(2; March–April
1992), pp. 60–71.
Relationship between Facilities and Functions along the
Wal-Mart Supply Chain
Vendor-Managed Inventory
▪Manufacturers generate orders, not distributors or
retailers
▪Stocking information is accessed using EDI
▪A first step towards supply chain collaboration
▪Increased speed, reduced errors, and improved
service
SCM Software
Enterprise Resource Planning (ERP)
software that integrates components of a company by
sharing and organizing information and data
SAP was first ERP software
mySAP.com
web enabled modules that allow collaboration between
companies along the supply chain
Linking Supply Chain with SAP
Measuring Supply Chain Performance
Key performance indicators
inventory turnover
cost of annual sales per inventory unit
inventory days of supply
total value of all items being held in inventory
fill rate
fraction of orders filled by a distribution center within a
specific time period
Inventory turns =
Average aggregate value of inventory
Cost of goods sold
Average aggregate value of inventory =
=(average inventory for item i)X (unit value item i)
Days of supply =
(Costs of goods sold)/(365 days)
Average aggregate value of inventory
Key Performance Indicators
Key Performance Indicators:
Example
Inventory turns =
$34,416,000
$425, 000, 000
Days of supply =
($425,000,000)/(365)
$34,416,000
= 12.3
= 29.6
1.Cost of goods sold: $425 million
2.Production materials and parts: $4,629,000
3.Work-in-process: $17,465,000
4.Finished goods: $12,322,000
5.Total average aggregate value of inventory (2+3+4): $34,416,000
Other Measures of Supply Chain
Performance
Process Control
used to monitor and control any process in supply chain
Supply Chain Operations Reference (SCOR)
establish targets to achieve “best in class” performance
SCOR Model Processes
Plan
Develop a course
of action that best
meets sourcing,
production and
delivery
requirements
Source
Procure goods
and services to
meet planned
or actual
demand
Make
Transform
product to a
finished state to
meet planned
or actual
demand
Deliver
Provide products
to meet demand,
including order
management,
transportation
and distribution
Return
Return
products,
post-delivery
customer
support
Number of days to achieve an unplanned
20% change in orders without a cost
penalty
Production
flexibility
Number of days for supply chain to
respond to an unplanned significant
change in demand without a cost penalty
Supply chain
response time
Supply Chain
Flexibility
Number of days from order receipt to
customer delivery
Order fulfillment
lead time
Supply Chain
Responsivenes
s
Percentage of orders delivered on time
and in full, perfectly matched with order
with no errors
Perfect order
fulfillment
Percentage of orders shipped within24
hours of order receipt
Fill rate
Percentage of orders delivered on time
and in full to the customer
Delivery
performance
Supply Chain
Delivery
Reliability
DefinitionPerformance
Metric
Performance
Attribute
SCOR: Customer Facing
DefinitionPerformance
Metric
Performance
Attribute
SCOR: Internal Facing
Revenue divided by total assets including working
capital and fixed assets
Asset turns
Number of days that cash is tied up as inventoryInventory days of
supply
Number of days that cash is tied up as working
capital
Cash-to-cash
cycle time
Supply Chain
Asset
Management
Efficiency
Direct and indirect costs associated with returns
including defective, planned maintenance and
excess inventory
Warranty/returns
processing cost
Direct material cost subtracted from revenue and
divided by the number of employees, similar to
sales per employee
Value-added
productivity
Direct cost of material and labor to produce a
product or service
Cost of goods
sold
Direct and indirect cost to plan, source and deliver
products and services
Supply chain
management cost
Supply Chain
Cost