Showing posts with label Supply Chain Management. Show all posts
Showing posts with label Supply Chain Management. Show all posts

Business Logistics - An Introduction

Logistics – Introduction

A dictionary definition of logistics is “the branch of military science having to do with procuring, maintaining, and transporting material, personnel, and facilities.”
The definition promulgated by the Council of Logistics Management (CLM), is: “Logistics is the process of planning, implementing, and controlling the efficient, cost-effective flow and storage of raw materials, in-process inventory, finished goods and related information from point of origin to point of consumption for the purpose of conforming to customer requirements.”
Ballou explained that in the context of manufacturing it appears from the definition that the logistician is concerned with flow of goods to and from his firm. But the responsibility extends to the flow of components and goods through the production process as well. But the logistician may not deal with detailed production processes, machine scheduling, quality control etc. in the production process. Also the manufacturing logistics definition excludes maintenance which is a part of military logistics.
The mission of logistics in a business firm is to get the right goods or services to the right place, at the right time, and in the desired condition, while making the greatest contribution to the firm. Value in logistics is a combination of time, place and cost.
Logistics is about creating value – value for customers, value for suppliers and value for the firm’s stakeholders.

The Activities of Logistics Function

Council of Logistics Management identified the following:


  • Customer Service
  • Demand Forecasting
  • Distribution Communications
  • Inventory Control
  • Material handling
  • Order Processing
  • Part and Service Support
  • Plant and Warehouse Site Selection
  • Purchasing
  • Packaging
  • Return Goods Handling
  • Salvage and Scarp Disposal
  • Traffic and Transportation
  • Warehousing and Storage


Case for Organizing a Separate Logistics Department

Both marketing and production have recognized the importance of logistical activities. According to Philip Kotler, “Marketing management is the process of planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services to create exchanges with target groups that satisfy individual and organizational objectives.”

Therefore distribution of goods is identified as an important activity in marketing. Ballou quotes, McClain and Thomas, who stated that operations management has the responsibility for the production and delivery of physical goods and services. Hence delivery of goods at destinations required by the customer or the sales department is recognized as a part of operations management function.

But Ballou argued that both marketing and production have more important core activities to perform and hence logistic activities may not get adequate attention. According to him marketing may be given the job of creating possession value and production may be given the job of creating form value. A separate logistics department would be concerned with providing time and place value. Ballou recognized the interface problems that arise as more departments are created and hence stresses the need for coordination.

Objectives of Business Logistics Function

The logistics function has to earn the highest possible return on investment over time as far as internal objective is concerned. But to achieve this internal objective it has to first achieve external objectives. It has to earn revenue and minimize costs.

Therefore a logistics system has to be designed and operated considering its impact on revenue contribution that comes through the quality of customer service provided and cost of logistics facilities, system and operation.

Costs of logistics function include capital costs are operating costs. Wages, public warehousing (rented warehouses or warehouse space) expenses, public transport expenses, financial expenses related to inventory investment, other administrative expenses are examples of operating costs. Capital costs are one time costs, own warehouse, own trucks are examples of capital costs.

The financial objective of the logistics function can be expressed as “Maximize over the time the ratio of the annual revenue (due to the customer level provided) less the operating costs of the logistics system to the annualized investment in the logistic system.”

Time value of money may be considered and the objective can be expressed in net present value (NPV) terms or internal rate of return (IRR) terms.


Study of Logistics

Study of logistics can focus on management process and the skills needed to perform the activities involved. Management process can be briefly described as planning, organizing and controlling. The three important domain areas of logistics are facilities location, inventory levels and mix, and transport facilities. Logistics function is concerned with providing service levels to customers and managing costs appropriately for the company. All decision making requires information. Study of logistics includes principles and practices related to the above issues.  Some of the issues are discussed in detail in specialized texts related to those areas and a logistician has to examine them now in the context of logistics.

References

Ronald H. Ballou, Business Logistics Management, Fourth Edition,  Prentice Hall Int. Inc., USA,  1999.
Joh O. McClain and L. Joseph Thomas, Operations Management: Production of Goods and Services, Second Edition, Prentice Hall, USA, 1985.


Dean Clemente - Presentation on Logistics and Distribution
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http://knol.google.com/k/narayana-rao/business-logistics-an-introduction/ 2utb2lsm2k7a/ 1384

Supply Chain Management: Review Notes Based on Chopra and Meindl's Book

Chopra and Meindl's book, Supply Chain Management: Strategy, Planning, and Operation, is a comprehensive introduction on supply chain management.



The book is organized into six parts and further divided into fifteen chapters.



In part one, consisting of three chapters, Chopra and Meindl establish a framework for analyzing supply chains. This includes definitions and examples of supply chains, relationships between supply chain strategy and a firm's competitive strategy, and drivers and obstacles of supply chain performance. The key drivers identified are inventory, transportation, facilities, and information.



Part two discusses how to plan supply and demand. The three chapters in this part cover forecasting, aggregate planning, and managing variability in supply and demand.



Part three is on inventory management. The three chapters in part three discuss cycle inventory, safety inventory, and determining the level of product availability.



Part four, in three chapters, covers transportation, network design, and information technology.



Part five covers coordination and e-business in the supply chain.
Part six, a single chapter, covers the financial evaluation of supply chain decisions.


Publisher :

Prentice-Hall

Year of Publication: 2001

Second Edition: 2004




Review Notes for Chapters

I. BUILDING A STRATEGIC FRAMEWORK TO ANALYZE SUPPLY CHAINS.

1. Understanding the Supply Chain.

2. Supply Chain Performance: Achieving Strategic Fit and Scope.

3. Supply Chain Drivers and Obstacles.




II. DESIGNING THE SUPPLY CHAIN NETWORK.

4. Designing the Distribution Network in a Supply Chain.

5. Network Design in the Supply Chain.

6. Network Design in an Uncertain Environment.




III. PLANNING DEMAND AND SUPPLY.
7. Demand Forecasting in a Supply Chain.

8. Aggregate Planning in the Supply Chain.

9. Planning Supply and Demand in the Supply Chain: Managing Predictable Variability.




IV. PLANNING AND MANAGING INVENTORIES IN A SUPPLY CHAIN.

10. Managing Economies of Scale in the Supply Chain: Cycle Inventory.

11. Managing Uncertainty in the Supply Chain: Safety Inventory.

12. Determining Optimal Level of Product Availability.



V. SOURCING, TRANSPORTING, AND PRICING PRODUCT.

13. Sourcing Decisions in a Supply Chain.

14. Transportation in the Supply Chain.

15. Pricing and Revenue Management in the Supply Chain.




VI. COORDINATION AND TECHNOLOGY IN THE SUPPLY CHAIN.

16. Coordination in the Supply Chain.

17. Information Technology and the Supply Chain.

18. e-business and the Supply Chain.

http://www.pearsonhighered.com/academic/product/0,,013101028X,00%2Ben-USS_01DBC.html

Supply Chain Performance: Achieving Strategic Fit and Scope - Review Notes


Chaper one is concerned with the question what is a supply chain?

Competitive Strategy and Supply Chain Strategy


A company's competitive strategy clearly spells out the set of customer needs that it seeks to satisfy through its products and services having a defined set of attributes.

The supply chain design or supply chain strategy must be in alignment with competitive strategy. A supply chain design can be taken up only after the competitive strategy is finalised and a supply chain needs to be redesigned or modified whenever there is a change in competitive strategy.

Chopra and Meindl use the concept of strategy to refer to what each function will try to do particularly well. They indicate that product strategy specifies  the portfolio of products that will be offered for sale by the company and product development strategy specifies the portfolio of new products that the company will develop. A marketing and sales strategy specifies how the market will be segmented and the products of the company are positioned, priced and promoted. The supply chain strategy determines the procurement process of the raw materials, transportation of materials, manufacture of the product,  distribution channels, warehousing and transportation of the products, and the follow-up services.

The supply chain strategy includes supplier strategy, operations strategy, and logistics strategy. Design decisions regarding inventory, transportation, operating facilities, and information flows in the supply chain of a company are all part of supply chain strategy.

The Process of Achieving Strategic Fit

Strategic fit between competitive strategy and supply chain strategy refers to the consistency between the customer needs that the competitive strategy aims to satisfy and the supply chain capabilities that the supply chain strategy aims to build. Chopra and Meindl stated an important point: no one function can ensure the chain's success. However, failure at one function may lead to failure of the overall chain.

Three steps are involved.

1. Understanding the customer needs regarding attributes of supply.
2. Understanding the supply chain attributes (alternatives available).
3. Achieving strategic fit. Making decision on the supply chain to best serve the needs of the target segment customers.

Understanding the Needs of the Customer Regarding Supply Attributes

Some of the attributes or dimensions of the supply are as follows:


The quantity of the product needed in each lot purchased. Preferred purchase quanity of the customer.
The response time from customer's enquiry.
The variety of products needed (applicable in case of a retail store, restaurant etc.).
The service level required (shortage of items)
The price of the product or service.
The desired rate of innovation.


Chopra and Meindl argued that while there are many attributes of the supply system which are to be understood from customer point of view and built into the supply chain, one key measure captures the variation for many of these attributes. That measure according to them is implied demand uncertainty. It is different from demand uncertainty. Demand uncertainty reflects the uncertainty of customer demand for a product. Implied demand uncertainty is uncertainty for a specific supply chain for the portion of the demand it caters to.

Implied demand uncertainty is defined in the context of multiple supply chains supplying the same product. Multiple supply chains come due to different attributes that they satisfy. An example is a firm supplying a product, say medicines, 24 hours versus a firm that supplies during normal day hours. The implied demand uncertainty for the 24 hour firm can be high as on some days there is heavy demand and some days very less demand and also the demand for specific medicines can be high on some days and can be even zero on some days.


Understanding the Supply Chain (Characteristics)

Supply chain characteristics contribute to responsiveness and efficiency.

Supply chain responsiveness is measured by the abilities of the chain to do the following:


Ability to respond to fluctuations in demand
Ability to provide short lead times
Ability to handle large variety of products
Ability to come out with innovations and highly innovative products
Ability to provide a very high service level


Supply chain efficiency is the cost of making and delivering a product to the customer. Increase in costs lower efficiency.

Cost-Responsiveness Efficient Frontier

It is a chart or graph with cost on the X-axis (origin is high cost) and Responsiveness on the Y axis (origin is low responsiveness). See Example

The frontier shows the minimum cost for a given responsiveness. If a company is operating at a higher cost, it can decrease the cost but keep the responsiveness same. When it is operating on the efficient frontier, any increase in responsiveness can only come by incurring extra cost, except when extra costs are equally matched on a slope to outputs.


Achieving strategic fit

The greater the implied demand uncertainty, the more responsive a supply chain has to be. More responsive supply chains are more costly supply chains. When compared directly with less responsive but more efficient supply chains, their costs may look excessive.

Expanding the Supply Chain Optimization and Strategic Fit Scope

Intracompany Intraoperation scope: The most limited scope over which strategic fit and optimization can be attempted is one with operation within a functional area in a company.

Intracompany Intrafunctional scope:  If the competitive strategy and supply chain strategy are aligned across all the operations functions of the company and optimization is attempted in an integral manner including the raw material inventory, manufacturing operations, finished goods inventory and warehouse, and transportation, the scope is extended to intracompany intrafuctional level.

Intracompany Interfunctional scope: At this level of scope, the entire company's activities are viewed and modeled as one single system, and optimization is done and company profit is maximized.

Intercompany Interfunctional scope: The Maximum Supply Chain Surplus view: At this level of optimization and fit making, the entire supply chain is modeled as a system and optimization and fit is designed so that supply chain surplus is maximized.

Flexible Intercompany interfunctional scope: The flexibility refers to dynamic situation. Physically, the participants in the supply chain keep changing, products keep changing, technologies keep changing, facilities keep changing. Mathematically, there are changes in number of variables and variable values. A supply chain capable of optimizing and fit making dynamically is a flexible intercompany interfuctional scope supply chain.






References


Sunil Chopra and Peter Meindl, Supply Chain Management: Strategy, Planning and Operations, Prentice Hall, 2001.

Fisher, Marshall L. "What is the Right Supply Chain for Your Product?" Harvard Business Review, March-April 1997, pp. 83-93.

Presentation Slides on Achieving Strategic Fit and Scope for Supply Chain

___________________________________________________________________________________________

For Further Reading

The Strategic Fit of Supply Chain Integration in TFL-LCD Industry
http://web.cc.chu.edu.tw/sha/files/honor/SCMAIJ.pdf

Sustaining Strategic Fit across Culturally Diverse Supply Chain Relationships
http://geconsult.blogspot.com/2010/05/corporate-strategy-sustaining-strategic.html

Relating Structure of Supply Chain Organization to Objectives: Few Propositions and a Pilot Study
http://www.iitk.ac.in/infocell/announce/convention/papers/Strategy-02-RRK%20Sharma,%20Rahul%20Sharma,H%20Hazaria%20final.pdf



__________________________________________________________________

Slides

http://www.slideserve.com/presentation/6980/Supply-Chain-Performance-Achieving-Strategic-Fit-and-Scope





Article originally posted at
http://knol.google.com/k/narayana-rao/aligning-competitive-strategy-and/2utb2lsm2k7a/1350

Updated 12.1.2012

Understanding the Supply Chain - Review Notes


Supply chain

A supply chain consists of all stages involed directly, or indirectly, in fulfilling a customer request for a product in an economy. Thus it includes customers who give the requests, transporters, retailers, wholesalers, warehoues, manufacturers, and component, service as well as raw material suppliers.
Within an organization there is a supply chain that includes all functions involved a filling a customer request as well as the order. The functions carried out within an organization at these stages in the supply chain include marketing, new product development, operations, distribution, finance and customer service.
In a supply chain there is constant flow of information, product and funds between stages. Usually supply chain is imagined as product moving from suppliers to manufacturers and from there to wholesalers and retailers and then further to customers. But supply chains have two way movements and also involve movement of information and fund apart from the product.
Customer is an integral part of the supply chain and the primary purpose of a supply chain is satisfying customer needs and generating profit for itself in the process.
The routine supply chain activities begin with a customer order and end when a satisfied customer has paid for his purchase.
In a supply chain, number of customers are there, number of retailers are there, number of transporters are there and number of manufacturing plants can be there. Hence a supply chain is actually a network or a web. Hence supply network and supply web also describe a supply chain.
The objective of every supply chain is to maximize the overall value generated. Supply chain management involves the management of flows between and among stages in a supply chain to maximize total profitability.

Decision Phases in a Supply Chain

Supply Chain Design, Plan and Operation are identified as three significant decision phases by Chopra and Meindl.
Supply Chain Design: Supply chain strategy is another word used for this phase. Supply chain design decisions or strategy decisions include products to be manufactured, location and capacities of manufacturing plants and warehouses, modes of trasport to be utilized and information system to be utilized.
Supply Chain Planning: Planning, typically done for an year, establishes parameters within which a supply chain will function over a specified period of time.
Supply Chain Operation: In this phase the time horizons are small, monthly, weekly and daily. The decisions driven by customer order and are related to invidual customer orders. There are also decision related to individual production facilities, warehouses and transporters.

Process Views of a Supply Chain

There are two views.

1. Cycle view

In cycle view, the supply chain processes are divided into cycles that are performed at the interface between two successive stages of a supply chain and one describes the following cycles.
Customer order cycle
Replenishment cycle
Manufacturing cycle
Procurement cycle

A. Customer order cycle

Normally occurs at the retailer place.

Activities involved
Customer arrival, Customer order entry, Customer order fulfilment, Customer order receiving, Customer funds payment

B. Replenishment cycles

Normally thought to occur at the retailer/wholesaler or distributor interface.

Activities involved
Retai order trigger, Retail order entry, Retail order fulfilment, Retail order receiving, Funds payment

C. Manufacturing cycle

Normally thought to occur at the wholer/manufacturer interface. Depending on the number of channels in the distribution channel it can occur at customer - manufacturer, or retailer - manufacturer also.

Activities involved

Order arrival, Production scheduling, Manufacturign and shipping, Receiving by the person ordered, Funds payment

D. Procurement cycle

Occurs at the manufacturer/supplier interface

2. Push/Pull View

In this view, pull processes and push processes are categorized and identified in the supply chain. The activities initiated by customers' orders form pull process activities. The activities initiated and carried out in anticipation of customer demand are push process activities.

Importance of Supply Chain Flows

Flow of information, material and product and cash are important for supply chain functioning and fulfilment of its objectives.

Information is key to produce as per customers' order and also to forecast in case of made-to-stock supply chains.
Reference
Sunil Chopra and Peter Meindl, Supply Chain Management: Strategy, Planning and Operations, Prentice Hall, 2001.

Presentation Slides on Understanding the Supply Chain

Full Chapter - WSC Book - Supply Chain Management - An Evolutionary View

Originally posted at
http://knol.google.com/k/narayana-rao/supply-chain-management-basic/2utb2lsm2k7a/1348#
Updated on 11.1.2012


Related Article
http://knol.google.com/k/narayana-rao/supply-chain-management/2utb2lsm2k7a/526

Designing the Distribution Network in a Supply Chain

Review to be posted

Supply Chain Drivers and Obstacles - Review Notes


The supply chain strategic fit concept requires that a company achieve the desired responsiveness and efficiency in its supply chain that best meets the needs of the company's competitive strategy.


The performance of a supply chain (responsiveness and efficiency) is determined by decisions in the areas of inventory, transportation, facilities and information. Hence these four areas are identified as drivers of supply chain performance.

A Framework for Structuring Supply Chain Drivers

Supply chain managers have to take research and development efforts to improve both responsiveness and efficiency of their supply chains on a continuous basis. In the past there were technological and managerial breakthroughs which improve one of them without any deterioration in the other and also improvement in both dimensions simulataneously. Actual economic theory tells, new technologies (capital investments) are adopted for capital productivity. Capital productivity in the context of supply chains comes through improvement in responsiveness and efficiency.

But at a certain point in time, there can be tradeoffs between resonsiveness and efficiency.  Hence supply chain designers come with supply chains with that give various combinations of responsiveness and efficiency (responsiveness - efficiency frontier) and the optimal combination is chosen based on the competitive strategy considerations.

Definition/Explanation of Four Drivers


Inventory: It consists of all raw material, work in process, and finished goods within a supply chain.
Transportation: It involves moving inventory from one point in the supply chain to another point.
Facilities: A facility is a place where inventory is stored, manufactured or assembled. Hence facilities can be categorised into production facilities and storage facilities.
Information: It consists of data and results of analysis regarding inventory, transportation, facilities, customer orders, customers, and funds.



Inventory

Inventory is maintained in the supply chain because of mismatches between supply and demand.

Types of inventory based on reasons for keeping them:


Cycle inventory: This results due to producing or buying larger lots to minimize acquisition costs related to processing each purchase order or production order.
Safety Inventory: It is held to counter against uncertainty or variability of demand.
Seasonal Inventory: It is inventory maintained to satisfy higher demands in a period compared to production capacity. It arises due to the decision to service predicted variability in demand through extra production during slack period or low demand periods.


Increasing inventory gives higher responsiveness but results in higher inventory carrying cost.

Transportation

Number of decisions have to taken in designing a supply chain regarding transportation.

Mode of Transportation: Six basic modes exist

Air

Truck (Road)
Rail
Ship
Pipeline
Electronic transportation (the newest mode for music, documents etc)


Route and Network Selection

Network is a set of facilities or destinations which can be used for transportation of goods. Route is a specific selection of facilities or destinations through which goods move.

Own Transport or Outsourced Transport


Facilities

Within a facility, inventory is either transformed into another state or stored.

Facilities Related Decisions

Location

Capacity
Manufacturing Methodology or Technology
Warehousing methodology


Information

Issues related to Information


Push Process Information and Pull Process Information
Coordination and information sharing across various facilities in the supply chain.
Forecasting
Aggregate Planning
Enabling technologies




References

Sunil Chopra and Peter Meindl, Supply Chain Management: Strategy, Planning and Operations, Prentice Hall, 2001.

Marien, Edward J. "The Four Supply Chain Enablers," Supply Chain Management Review, March/April 2000, pp. 60-68

Presentation slides on the topic
www.clt.astate.edu/asyamil/SCM_Chopra/chopra3_ppt_ch03.ppt
Presentation - Supply chain drivers and metrics

Article originally posted at
http://knol.google.com/k/narayana-rao/drivers-of-supply-chain-performance/2utb2lsm2k7a/1351#
 
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