dr rovel shackleford procurment fundamantals june 2011
DESCRIPTION
Procurement Fundamantals for purchasing personnel in the public and private sectors by Dr Rovel ShacklefordTRANSCRIPT
Objectives (1)
1. Identify the impact purchasing has on the organisations balance
sheet
2. Identify an applicable code of ethics for buyers
3. Compare the BoB’s purchasing system and procedures to those of
industry and commerce.
4. Explain the need for for accurate, detailed information.
5. Identify the character of various supply markets.
6. Plan an approach to suppliers.
7. Plan and conduct a survey of potential suppliers.
8. Analyse a suppliers capabilities and capacity
9. Rate a suppliers performance
Objectives (2)
10. Compare and contrast cost and price analysis
11. Perform cost analysis
12. Perform price analysis
13. Select a supplier
14. Communicate a supplier selection result
15. Recognize how a contract is formed
16. Describe the elements of a contract
17. Define common trade terms
18. Explain how to change a contract once it is made
19. Identify when to seek advice and help in contract matters
The Five Rights of Purchasing
The specified equipment, material, supplies and services must be obtained:
In the...............................................Right Quantity
With the...........................................Right Quality
At the ..............................................Right Time
Delivered to the ..............................Right Place
All of which should be achieved at
the..................................................Right Price
Challenges in Purchasing
� Understanding End User Requirement
� Cost Containment
� Cost Reduction
� Value Enhancement
� Service Delivery - Balance Cost Quality
Effect of Purchase Savings on ROI
InvestmentTurnover
2.1
ROI
10.5%
ProfitMargin
5.0%
Sales$20 m
Total Assets
$9.1 m
Profit$1 m
Sales$20 m
Total Costs$19 m
Other Costs$8.4 m
Purchases$10.6 m
Sales$20 m
Multiplied By
Divided By
Divided By
Minus
Plus
13.6%or 29%
Improvement
(6.5%)
$1.3 m
($18.7 m)
($10.3 m)
Net Profit Versus Purchasing Savings
At 5 % Net Profit Margin, an Organization needs :
$20 of sales to generate
$1 contribution to the balance sheet
Whereas
Every $1 saved by purchasing is a
$1 contribution to the balance sheet
Characteristics of a Profession
� A Body of knowledge and/or principles
� Responsibility to clients or employer
� A code of ethics
� Exchange of information
Code of Ethics
� Consider the Organization’s Interests First
� Be Open to Advice
� Obtain Maximum Value
� Obtain Knowledge of all Processes
� Be Honest, Avoid Sharp Practice
� Be Courteous and Professional in all Dealings
� Respect the Obligations of all Parties
� Assist Other Commodity Officers and Organizations
Conflict of Interest
� Employees must be careful that their interests are not in conflict with their organizations interests
Outside Employment and Other Activities
� Keep all outside activity totally separate from your organizations work
� Not undertaking outside work without approval
� Ensure outside activity does not involve use of your organisations information, property, funds, materials, systems or time
� Avoid outside activity likely to affect your performance or conflict with your organisations interests
Conflict of Interest
Dealing with Suppliers
� Business is awarded strictly on suitability, quality and price
� Avoid relationships with current or potential suppliers that may be seen
as influencing your judgement
� Be careful in accepting gifts - restrict to nominal value items only
� Do not solicit expensive hospitality, concessional travel, gifts or loans
� If you accept a meal or a few drinks in interests of normal business courtesy, return the compliment as soon as practical
� If in doubt on any matter seek advice from your manager or the organization’s Ethical Standards Committee
Stages of Purchasing
� Recognition of Need
� Procurement/Requisition Planning
� Supply Market Analysis
� Requisitioning Method
� Offer or Bid Analysis
� Order or Contract
� Contract/Supply Management and review
Information to be Shown on Requisition
� Adequate Description of Item Service to be Purchased
� Required Delivery Date
� Delivery Point
� Specification - Minimum Requirement
� Clear Statement of End Use
� Estimated Cost/Budget (Optional)
� Inspection Requirements
� Confidentiality Requirements (Optional)
Supply Market Dynamics
Three fundamental types of competition
� Pure
� Monopoly
� Imperfect
Types of Competition
Pure Competition
Forces of supply and demand alone determine
prices not the individual actions of buyers or
sellers
Monopoly
One seller or selling group controls the entire
supply of a particular commodity and is free to
maximise profits by regulating output
Types of competition (2)
- Imperfect competition
Essentially two types:
� Markets characterised by few sellers producing relatively few different products.– Automobile, steel, cigarette industries are examples of
this oligopoly situation.
� Market characterised by many sellers producing many products.– Sellers spend much money and effort to persuade buyers
their products are different.
– This is the market for the majority of products in developed contracts.
Locating a Supplier
- Sourcing
� Experience Memory
� Supplier Files
� Trade Magazines
� Catalogues
� Directories
� Sales Representatives
� Peers
� Trade Commissioners at Embassies and Consulates
� Banks International Trade Department
� Advertising - Tendering
� Chambers of Commerce
� Trading Houses
Supplier Analysis
� Management Capabilities
� Quality Standards - Performance
� Technology
� Physical Facilities
� Financial Capacity
Supplier Analysis
Capacity
� Plant, Machine and or Service Capacity
� HR Manpower Capacity Order Bookings
Technical Capabilities
� Staff
� Machine
� Quality Standards
� Field Service
� Customer Reference
Supplier Analysis
Security
� Raw Materials
� Licences
� Against Takeover
Supplier Financial Strength
� Balance Sheet Review Mercantile Reports
� Customer References
Supplier Analysis
Additional Checks
� Plant Visit and Audit
� Qualifications of Key Staff Validated
� Patents Licenses Held
� Insurances Held - ExpiryDate
Weighted Point Rating System
1.Establish rating factors
2.Determine relative importance
3.Compute values
Example : Quality = 40 Points
Price = 35 Points
Delivery = 25 Points
Relationship of Price to Cost
A Fair Price:
� Will the lowest price that ensure a continuous supply from a vendor who is making a reasonable profit
� The buyer must always try to ascertain what is a fair price
Meaning of Cost
� Price is one element of cost
� Cost includes transportation, handling, storage, and also quality, service and obsolescence
Cost and Price Issues for Consideration (1)
� Competitive Bid - v - Single Bid ?
� Is the Business Base Loaded for Supplier ?
� Should Full Cost Disclosure be Requested ?
� Should Supplier Help with Life Cycle Costing ?
� Can the Learning Curve be Applied ?
Cost and Price Issues for Considerations (2)
� Where Should Order be Placed in the Distribution Chain ?
� Is There an Imported Content that Lends Itself to Preferential Treatment ?
� Is There the Possibility of Further Orders ?
� Is the Organization to Finance Research, Tooling or Development ?
� Should Penalties for Non Performance be Considered ?
Cost Breakdown
Direct Costs
� Are those which can be specifically and accurately assigned to a given unit of production/service
Indirect Costs
� Are those incurred in the operation of a production plant or process but which normally cannot be related directly to any given unit of production
� For example, rent, property taxes, machine depreciation and so on
The Essential Elements of a Contract
1. An intention by the parties to create a legal relationship
2. An offer made by one party and accepted by the other party
3. Valuable consideration
4. Legal capacity of the parties to enter into a legal relationship
5. Genuine agreement and consent by the parties
6. Legality of the objects of the agreement
All of the above elements must be present for a contract
to be valid
Rules of Acceptance
1. Must be communicated to the offerer or the offerer must have dispensed with notification thereof
2. Must be unconditional
3. Must be made in the way specified/prescribed
4. Can only be given by the party or parties to whom the offer was made
5. Cannot be revoked without the consent of the offerer
6. Must be made within the time prescribed, or if no time prescribed, then within a reasonable time
Consideration
1. Is essential in every simple contract
2. Must have some value, but courts are not concerned as to its adequacy
3. Must not be illegal or unlawful
4. Must be definite
5. Should be present or future, but not past
6. Must be possible of performance
7. Must move from the promisee
8. Must amount to something more than the party is obliged to already do
Additional Considerations for Buyers
� Inadvertent formation of a verbal contract during negotiation.
� The relevant strength of contractual clauses.
� Conditional and warranty clauses and remedies for breach.
� Use of functional specifications to enhance protection under concept of merchantability.
� If possible include functional specifications as an adjunct to technical specifications.
� If progress payment are to be part of a contract ensure the payment are linked to identifiable completed stages of a project and that a suitable passing of title clause is incorporated into the order.
Supplier Performance Analysis
Purpose:
� Improve Performance of the Supplier.
Benefits:
� Better Information for Decision Making.
� Fair Judgement on Competing Bids.
� Aid to Supplier in Improving Performance.
� Basis of Dropping Poor Suppliers.
The Three Basic Systems
1. Categorical - Generally too basic.
2. Cost Ratio - Data collecting too onerous for
most organisations.
3. Weighted Point - Most commonly used.
The Five Rights of Purchasing & the
Weighted Point System
5 Rights Weighted Point
Right Quality - Quality
Right Price - Price
Right Quantity - Delivery
Right Time - Delivery
Right Place - Delivery
Weighted Point Rating System
The Steps
1. Establish rating factors
2. Determine relative importance
3. Compute values
Weighted Point System - Example
Quality = 40 Points
Price = 35 Points
Delivery = 25 Points
100 Points
Quality
Supplier A
Supplier B
Supplier C
Lots
Received
Lots
Accepted
Lots
Rejected
Percentage
Accepted x Factor
Quality
Control
Rating
60
60
20
54
56
16
6
4
4
90.0
93.3
80.0 32.0
37.3
36.040
40
40
Delivery
90%
95%
100%
25
25
25
22.5
23.8
25.0
Supplier A
Supplier B
Supplier C
Promises Kept Service Factor Service Rating
Service rating = Promises kept X Service factor
Part A
Unit price discount Transportation Net price
charge
Supplier A $1.00 10% $0.9 $0.03 $0.93
Supplier B $1.25 15% $1.06 $0.06 $1.12
Supplier C $1.50 20% $1.20 $0.03 $1.23
Part B
Lowest Net Percentage x Factor = Price
price price rating
Supplier A $0.93 $0.93 93/93 100% 35 35.0
Supplier B $0.93 $1.12 93/112 83% 35 29.1
Supplier C $0.93 $1.23 93/123 75.6% 35 26.6
Price
Composite Rating
Rating Supplier A Supplier B Supplier C
Quality
(40 Points)
Price
(35 Points)
Service
(25Points)
36.0
35.0
22.5
93.50Total
Rating
37.3
29.1
23.8
90.20
32.0
26.6
25.0
83.60
Factor Guidance Scale
100
(Excellent)
Quality
(40 Points)
Price
(35 Points)
Service
(25Points)
94 - 99
(Good)87 - 94
(Fair)
Under 87 (Needs
investigation)
40
35
25
38 - 39
33 - 34
23 - 24
36 - 37
31 - 32
21 - 22
Under 36
Under 31
Under 21
Purchaser - Supplier Satisfaction Model
Satisfied
Marginal
Dissatisfied
Purchaser DissatisfiedSupplier Satisfied
Purchaser SatisfiedSupplier Satisfied
Purchaser DissatisfiedSupplier Dissatisfied
Purchaser SatisfiedSupplier Dissatisfied
SatisfiedMarginalDissatisfied
(10, 5)
(5, 10) (10,10)(0.10)
(0,5)(5, 5)
C
C
A
A
Supplier
Purchaser
Extended Analysis
Management
Quality
Price
Delivery
Technology
Elements of Management
� Organisational Structure
� Industrial Stability
� Responsiveness
Elements of Quality
1. Use of Statistical Process Control
2. Quality Standards IS0 9002
3. Problem Responsiveness
4. Utilisation Of Statistical Process Control.
5. Problem Reporting And Resolution.
6. Notification Of Changes.
7. Record Retention And Control.
Elements of Price
1. Globally Competitive
2. ProductivityService Offsets
3. Cost Reduction Program
4. Price Control
5. Long Term Contract Agreement
6. Product Development Cost Disclosure
7. Logistics
Elements of Delivery
1. Supply Performance Against Schedule
2. Notification Of Impending Problems
3. Effective Contacts
4. Valid Lead Times
5. Invoice And Packing Accuracy
6. Inventory Control
7. Electronic Data Interchange
8. Manufacturing Resources Planning
Elements of Technology
� Access to Technology
� Prototype Support
� Research and Development
Degrees of Importance to an Organisation
(Example)
Quality
Delivery
Price
Purchasing Technical Average
20
40
50
60
10
20
40
25
35
110 90 100
Quality - Example
1. Use of statistical process control
2. Problem responsiveness
3. Achieved ISO 9000 Standard
Weight Score Score
10
10
20
10
5
10
40 25
Elements
Total
Delivery - Example
1. Performance against schedule
2. Flexibility to schedule changes
3. Inventory control
Weight score Score
15
5
5
15
4
5
25 24
Elements
Total
Price - Example
1. Competitive - Global
2. Price Cost - Disclosure
4. Productivity offsets. Minimum 2.5%/Yr
Weight score Score
10
5
5
5
35 27
Elements
Total
3. Absorption - zero economics 10 10
710
Supplier Continuous Improvement Program(An example from a motor vehicle manufacturer)
Process
•The team will conduct a preliminary internal assessment of the suppliers performance, quality, cost, delivery and technology.
•The team visit will consist of members from the company’s supply and quality assurance.
•Where there is limited knowledge of an element, the team will rate the element as zero “with an asterisk”. This element will be reviewed during the arranged team visit.
•Prior to the team visit, the preliminary assessment will be provided to the supplier for review and development of an action plan which will be focussed on continuous improvement.
•The visit will include a tour of supplier’s facilities and the preliminary assessment will be used as the basis of discussions with supplier senior management.
•During the team visit the supplier will provide a timed action plan for continuous improvement and identify any elements that require further clarification.
•The team will reconvene at and any additional supplier information will be considered to finalise scores.
•Revisions will be formally notified future assessments will be conducted as required.
•The ratings achieved against the performance standards will predicate future business
Supplier Continuous Improvement Program
Definition of Elements - Management
1. Effectiveness
The supplier's management team will demonstrate effective control of the key business elements of Management, Quality, Cost , Delivery and Technology.
2. Viability
The supplier's management team must ensure the company's viability is sustained to provide continuity of supply.
3. Committed to the customer.
The support and active participation in the supplier continuous improvement process will be the measure of the supplier management team commitment.
4. Continuous improvement philosophy
The supplier's management team will engender the philosophy of continuous improvement in the pursuit of excellence.
5. Business plan
The supplier's management team shall develop and provide a long term business plan and progress report which will embrace, but not be limited to the Supplier Continuous Improvement Programme elements.
6. Communication
The supplier's management team will have an effective communication system that implements two way communication between management and employees.
7. Responsiveness
The supplier's management team must be responsive to the customer’s requirements.
Supplier Continuous Improvement Program
Definition of Elements - Quality
8. Utilisation of Statistical Process Control :-
The supplier assessment is based on the utilisation of S.P.C. techniques to control process outcomes.
9. Process Control Plan (PCP):
The supplier assessment is based on the establishment of approved P.C.P.'s, conformance, and notification of pending changes.
10. Material Identification And Control
The supplier assessment is based on the identification and control of material during all stages of the process, indicating the quality status from receipt through to delivery.
11. Problem Reporting And Resolution :-
The supplier assessment is based on having in place a system to report and correct both internal and external quality problems.
12. Drawing And Specification Control :-
The supplier assessment is based on having an effective system for controlling the engineering drawings and specifications supplied to ensure only latest engineering data is being used.
13. Sample Submission Process:-
The supplier assessment is based on adherence to sample procedure and satisfactory conformance to the total submission.
Supplier Continuous Improvement Program
Definition of Elements - Cost
1. Competitive Global :-
The supplier's assessment is based on being cost competitive in a global environment.
2. Competitive Local :-
The supplier's assessment is based on being cost competitive in a local environment.
3. Piece Cost Disclosure
The supplier will provide complete piece cost disclosure at the time of quotation and in subsequent price variations for all elements detailed in " Supplier Cost Analysis " format.
4. Absorption (Zero Economics):.
The supplier will have a control to eliminate the automatic flow on of cost increases.
5. Productivity Offsets (2.5% PA.):
The supplier will reduce the component selling price to by a minimum of 2.5% per annum.
6. Reduction Program: - The supplier will have an active program to reduce product piece costs which will be shared equally between buyer and the supplier.
7. Price Control :- The supplier will use effective systems to accurately monitor all cost elements.
8. Long Term Contract Agreement: The supplier will have a proven record of Management, Quality, Cost, Delivery and Technology to be considered for a long term contract
Supplier Continuous Improvement Program
Definition of Elements – Cost (2)
Supplier Continuous Improvement Program
Definition of Elements - Delivery
1. Supply Performance Against Schedule :- The supplierwill control resources in a manner that assures conformance to scheduled requirements.
2. Flexibility To Schedule Changes :- The supplier will have the ability to accommodate positive/negative volume changes within the contractual lead time.
3. Flexibility To Replace Material The supplier will have the ability to supply replacement material ensure production continuity.
4. Notification of Impending Problems :- The supplier is responsible to contact Material Control in the likelihoodof a delivery interruption.
5. Flexibility Of Delivery Promises :- The supplier mustprovide timed and accurate information against critical shortages.
6. Responsive Recovery Programs :- The supplier will
provide written recovery programs to cover behind
schedule items and maintain production continuity.
7. Effective Contacts :- The supplier must provide
sufficient resources to return calls within a reasonable
period from the initial contact with timely resolution of
problems.
8. Valid Lead Times :- The supplier will provide the
necessary resources to achieve the contractual lead
times.
Supplier Continuous Improvement Program
Definition of Elements - Delivery
Supplier Continuous Improvement Program
Definition of Elements - Technology
1. Product design and development
A supplier is expected to have the resources to design and develop parts.
2. Manufacture. design/.development
A supplier is expected to have appropriate technical capabilities for the manufacturing design and development of parts and/or systems.
3. Product testing facilities
A supplier is expected to have the capabilities to perform all applicable performance tests on its parts or systems.
4. Prototype support
A supplier is expected to have the resources for prototype development.
5. Research & development activities
A supplier is expected to have the resources to undertake research and development activities.
6. Manufacturing capability
A supplier is expected to have the appropriate capabilities for the manufacture of parts and/or systems.
7. Maintenance activities
A supplier is expected to dedicate appropriate resources to maintenance.
8. Tool design and fabrication
A supplier is expected to provide appropriate resources and facilities for tool design and fabrication.
Supplier Continuous Improvement Program
Definition of Elements - Technology
Inventories and the Flow of Material
WarehouseCustomer
Demand
WarehouseCustomer
Demand
WarehouseCustomer
Demand
Supplier Purchased
Parts &
Material
Work In
Progress
Objectives of Inventory Management
A. Define and attain a desired customer service
level
B.Keep inventory investment below a certain level
C.Support the achievement of specified workforce
and equipment utilisation methods
D. Achieve a desired return on investment
Supply and Demand Considerations
1. Demand pattern of item
2. Production process at supplier
3. Variability of supply and demand
4. Marketing logistics
5. Lead times
6. Commonality of supply and demand sources
Functions of Inventory (1)
Decouple demand and supply. Inventory is a buffer between:
Customer demand and finished Goods
Finished goods and component availability
Material required and the output of the preceding
for an operation operation
Materials required and the suppliers of materials
to begin production
The user and variations in the cost of inventory
The geographical and the geographical location of the
location of the user supplier
Functions of Inventory (2)
� Fluctuation (Safety Stock)
� Anticipation (Seasonal)
� Transportation
� Lot Size (Cycle Stock)
� Decoupling
� Hedge
Logistics Chains
Our Organization
Purchasing
Operations Planning
Distribution
Transport
Supplier Supplier Supplier Supplier
Impact of Inventory Investment
Impact on Small Inventory Large Inventory
Cash investment
Customer service
Order costs
Production set
up costs
Transport &
handling costs
Low
Low
High
High
High
High
High
Low
Low
Low
Inventory Costs: Ordering
� Raising the Requisition
� Compiling the Order
� Receiving the Goods
� Physical Inspection
� Processing the Invoice
� Raising the Cheque
Example
Inventory Costs: Carrying Stock
Finance 10 - 14% pa
Opportunity 3 - 10%
Handling 1 - 2%
Space 1 - 3%
Damage 1 - 2%
Shrinkage 0 - 2%
Insurance 1 - 3%
Physical Inventory 1 - 2%
General Administration 1 - 2%
Total 19 - 40% Per Annum
Average Holding Time = 6 Weeks
Inventory Costs: Stock out
� Expediting Costs
� Freight Premiums
� Back-Order Processing
� Intangible Costs such as Lost
Opportunity and End user Goodwill
Customer Service
Customer Service is
HAVING ITEMS AVAILABLE WHEN NEEDED
The customer is:
User of a finished product/service
Another warehouse
The department performing the next operation
Obtain customer service target level for:
The initial schedule
Backorders (make to order only)
Inventory Management
Reduced Throughput Time
Reduced Inventory Levels
Frees up working capital
Reduces Debt
Reduces Interest Cost
Improves Performance
Probability of On-Time Delivery
Assemble to order
Lead Lead
Time Time
Operation (Days) Probability (Days) Probability
Order Entry 1 0.99 2 0.995
Sub-assembly
available
Item 1 0.99 0.99
Item 2 0.95 0.95
Item 3 0.98 0.98
Picking 2 0.99 3 0.95
Final Assembly 5 0.92 7 0.99
Pack and Ship 2 0.96 3 0.99
10 days 80% 15 days 90%
Normal Probability Demand Distribution
34% 34%
14% 14%2% 2%
0−1σ−2σ +1σ +2σ−3σ +3σ
Levels of Aggregation
The Three Levels of Aggregation Frequently Used
for Classifying Inventory Management Decisions:
A. The aggregate level
B. The intermediate (group) level
C. The individual item level
Aggregate Inventory Management
Factors:
A. Distribution plan
B. Suppliers schedule
C. Purchasing commitments
D. Family/Item lot sizes
E. Safety Stock levels
F. Quantity discount/hedge purchase
G. Transport modes
Principle of ABC Analysis:
“Control the Vital Few”
� Establish levels of importance
– 80/20 rule
– other item characteristics
� Classify each item
� Apply the necessary amount of control
ABC Curve
Percentage of Value -V- Percentage of
Items
Percentage of Items
0102030405060708090100
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 10
0
ItemsA
Items ItemsB C
Relative Measures of Inventory Investment
A The Inventory Turnover Rate (ITR)
1.Historical (HITR)
2.Projected (PITR)
B The Inventory to Cost of Sales Ratio
C Time Period Coverage
Essential Steps in Obtaining Accurate
Records
A.Demand accurate records. (Management's
attitude determines how operating personnel
view this objective).
B Designate those responsible for each aspect of
record accuracy.
C Provide adequate tools.
D Provide adequate training.
E Establish accuracy goals and measure
performance.
Demand
Dependent
Subassemblies Calculated
Components Requirements
Raw Materials
Independent
Finished Goods Forecasted
Service Parts Requirements
Inventory Management Concepts
Match Order Size Not matching Order Size
and Timing to Use or Timing to Use
Time Phased Non Time Phased
MRP DRP Periodic Constant
Periodic Reorder point
Review Two bin
The Periodic Review System
Conditions
� Demand is independent
� Difficult to record withdrawals
� Joint orders
� Limited shelf life
� Fully utilising transport capacity
Periodic Review System
Safety Stock
Units6 = 5.71 =
2)/1 + (10 1.0 1.65 = SS
Days 2 = L Time Lead = L
days 10 = R Period Review = R
day 1.0 = FP thusunit/day, 1.0 = S Deviation Standard = SD
1.65 = 0.95)(for SF Factor Safety = SF
0.95 = ServiceCustomer Desired Stock Safety = SS
:Example :Where
FP * L) + (R * SD * SF = SS
Order Point System
Stock Versus Time
L
OP
QS
Units
in Stock
Time
Independent Demand
Net Requirements
minus
equals
Total Requirements Available Inventory
Net
Requirements
Gross
require-
ments
Allocat-
ionsOn Hand
Scheduled
Receipts+ +
The MRP Process
5 6 7 8 9 10 11
1 2
X
Part "1" Inventory status
On Hand 50
Allocated 10
Part Master Data
Safety Stock 10
Lead Time 3 Periods
Lot Size 100
Master Schedule
Periods
Lead Time = 4 Periods
Product "X"
Planned Order Receipts
Periods
Gross Requirements
Allocations
Scheduled Receipts
Safety Stock
Projected on Hand
Net Requirements
Planned Order Release
0 1 2 3 4 5 6 7 8
10
0
50 40 15 15 85 85 85 70 70
25 15
15
30
100
100
25 30 15
Pull & Push Systems
Pull Systems
Decentralised
Warehouse submits order
Stock is pulled
Push Systems
Centralised
Warehouse requirements projected
Available inventory allocated