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The most thorough introduction available regarding inventory management—now thoroughly updated and expanded—
Essentials of Inventory Management gives you the answers you need to every question you'll ever have about core inventory concepts, from a financial, physical, forecasting, and operational standpoint. Whether you're a seasoned inventory control professional, new to stockroom/ warehouse management, or a small business owner who needs to keep on top of everything, this essential guide provides you with timeless stock-keeping fundamentals for optimizing efficiency and driving profits.
Perfect for both instructional and on-the-job use, this nontechnical yet thorough guide helps you understand business realities and to make decisions that balance current demand with future needs while keeping overhead and operating costs to a minimum. Focusing on daily-use inventory concepts and enabling you to analyze and fix dysfunctions when they occur, the book provides the tools and practical guidance you need to:
• Forecast inventory levels and undertake stock replenishment so you have the right items, in the right quantities, at the right time, and in the right place.
• Apply simple formulas to compute breakeven points, profit margins, markups and markdowns, as well as selling price and margin percentages.
• Use financial ratios to improve the operation of your business.
• Manage inventory as both a physical and database object.
• Set up effective stock locator systems.
• Implement efficient item placement theories.
• Consider the differences between finished-goods (retail) inventories and raw materials or work-in-process (manufacturing) inventories.
• Decide when to dispose of dead stock.
• Choose the right cycle counting method for your organization and use it to head off long-range problems.
• Understand materials requirements planning (MRP) and just-in-time (JIT) inventory systems.
• Guard against supply chain risks.
From physical stock issues to problem identification and resolution to technologies like RFID and other automated inventory mechanisms, the second edition of Essentials of Inventory Management is a no-nonsense, how-to-get-it-done-right guide every inventory manager will turn to again and again.
MAX MULLER is an attorney who has been chief executive officer or chief operating officer for numerous companies distributing products ranging from food to ATMs to safety equipment. An authorized General Industry Outreach Trainer for the Occupational Safety and Health Administration (OSHA), U.S. Department of Labor, his seminars throughout the United States, Canada, and the United Kingdom have drawn more than 100,000 attendees. His books include The Manager's Guide to HR as well as the first edition of Essentials of Inventory Management.
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Excerpt
Introduction to the Second Edition
When I wrote the first edition of Essentials of Inventory Management
my objective was to present, in accessible language supported
by copious illustrations and examples, timeless inventory
management concepts and techniques. My purpose was to give the
reader a fundamental understanding of inventory as it exists in the
physical world (shelf count), and as an intangible item (record
count) existing in a computer database and/or on paper.
The basic principles covered in that edition are as relevant today,
even with the explosion of Internet-based e-commerce solutions to
many inventory and materials management issues, as when they
were first written.
I am pleased to note that the book was successful. It has been
translated into Spanish, with distribution in a number of Spanishspeaking
countries, and, an English-language soft cover edition is
being distributed in India, Pakistan, Sri Lanka, Nepal, and
Bangladesh. AMACOM Books and I have received excellent responses
to the first edition from individuals just beginning their careers
in fields related to inventory management, as well as from
experienced materials managers who reported that the book reminded
them of effective techniques they had known but had forgotten
over the years.
Over the past several years, as I have continued to lecture and
consult, it became apparent that the book could be enhanced by
adding chapters and sections on subjects such as cycle counting,
enterprise resource planning, and supply chain management. And
so, this second edition was born.
The second edition retains the timeless, essential inventory
management basics that are the hallmarks of the first edition, with
new and expanded information that includes:
Introduction to the second edition
FM-Essential Inventory Mgmt 12/6/10 12:55 PM Page xi
? An expansion of Chapter 2, "Inventory as Money,? to
include a section dealing with profit margins and
merchandising metrics and containing both examples
and formulae related to merchandising.
? A renamed Chapter 4, "Automated Inventory
Identification Systems,? with new material on Radio
Frequency Identification Systems (RFID) that discusses
the strengths and challenges associated with this
technology.
? New coverage in Chapter 5, "Planning and
Replenishment Concepts,? of the benefits of enterprise
resource planning (ERP), including the five main reasons
why an enterprise should consider incorporating this
concept into its organization.
? A revised and expanded Chapter 6, "Why Inventory
Systems Fail and How to Fix Them,? which includes new
material regarding how to distinguish A-B-C cycle
counting analysis using a single factor from approaches
combining multiple factors (e.g., dollar value and usage
rate). The chapter now explains in detail how to
undertake an A-B-C cycle counting analysis by
combining multiple factors.
? A new Chapter 7, "Basics of Supply Chain Risk
Management,? reveals how the very techniques that have
allowed American businesses to slash operating costs and
inventories by embracing just-in-time and lean
manufacturing techniques have made them vulnerable to
a number of serious supply chain risks. It offers
suggestions regarding steps organizations should take in
trying to balance the risks and rewards of SCM, and
xii Introduction to the second edition
FM-Essential Inventory Mgmt 12/6/10 12:55 PM Page xii
provides a starting point to any supply chain risk
management effort.
And, of course, as it has since the first edition, the book introduces
the new stockroom/warehouse manager, the nonfinancial
inventory control individual, and the small business owner to the
fundamental nature of inventory from financial, physical, forecasting,
and operational standpoints. In addition, it explains in easily
understandable terms the concepts underlying automated identification
of product through both bar coding and RFID.
The ultimate goal of this book is to present immediately usable
information in the areas of forecasting, physical control and layout,
problem recognition, and resolution, as well as how to begin to better
manage a supply chain.
Ultimately, Essentials of Inventory Management will enable you
to:
? Understand that modern practice discourages holding
large quantities of inventory and encourages only having
amounts on hand required for current needs.
? Grasp the signific ance of controlling actual, on-hand
inventory as both a physical object (shelf count) and as
an intangible object (record count and monetary worth).
? Appreciate the fundamental differences between finished
goods inventories in the retail/distribution sectors and
raw materials and work-in-process inventories found in
the manufacturing environment.
? Apply basic formulae to calculating inventory quantities.
? Utilize basic formulae to compute breakeven points,
profit margins, markups and markdowns, as well as
selling price and margin percentages.
Introduction to the second edition xiii
FM-Essential Inventory Mgmt 12/6/10 12:55 PM Page xiii
? Select the cycle counting inventory method that is right
for you.
? Undertake an A-B-C cycle counting analysis by
combining multiple factors.
? Recognize and analyze dysfunctions within your own
operation.
? Employ basic problem-solving techniques to issue
resolution.
? Control the physical location of inventory in a more
efficient manner.
? Analyze whether or not RFID is right for your
organization.
? Be aware of supply chain management risks and possible
solutions.
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Table of Contents
Contents
Preface to the Second Edition
Chapter 1 Inventory as Both a Tangible and an
Intangible Object
Inventory—Who Needs It?
Inventory Costs
The Purpose of Inventory
Types of Stock
Tracking the Paper Life
Electronic Data Interchange
Recap
Review Questions
Chapter 2 Inventory as Money
Accounting for Inventories
How Inventory Is Valued Inventory on the Balance Sheet
Inventory on the Income Statement
Ratio Analyses and What they Mean
Current Ratio
Quick Ratio or Acid Test
Inventory Turnover Ratio
Profit Margins
Calculating Gross Profit
Merchandising Metrics
Pricing Generally
Selling Price
Obsolete Stock
Why You Have Been Told Not to Dispose of
Obsolete Stock
Problems with Convincing Decision Makers
That "It's Gotta Go?
Arguments in Favor of Disposing of Dead Stock
Methods of Disposal
Carrying Cost and Purchasing
Recap
Review Questions
Chapter 3 Physical Location and Control of Inventory
Common Locator Systems
Memory Systems
Fixed Location Systems
Zoning Systems
Random Locator Systems
Combination Systems
Common Item Placement Theories
Inventory Stratification
Family Grouping
Special Considerations
Location Addresses and SKU Identifiers
Significance
Keys to Effectively Tying Together SKUs and
Location Addresses
Recap
Review Questions
Chapter 4 Automatic Identification
The Basics of Bar Coding
Elements of a Bar Code Symbol
Structure of a Generic Bar Code Symbol 96
Quiet Zone
Start and Stop Characters
Data Characters
"X? Dimension
Symbologies: Bar Coding Structural Rules
Discrete and Continuous Symbologies
Symbology Summary
Popular Symbologies Found in the
Inventory World
Scanning Basics
Printing Basics
Bar Code Applications
The Basics of Radio-Frequency Identification
RFID Tag Types and Classes
Bar Code versus RFID
RFID Item Identification
The Advantages of RFID
The Problems Associated with RFID
Lack of RFID Standards
Money, Money, Money
System Disruption Vulnerability
RFID Reader Collision
RFID Tag Collision
Security, Privacy, and Ethics Problems with RFID
Recap
Review Questions
Chapter 5 Planning and Replenishment Concept
Replenishment Costs
Types of Inventory Management
Independent Demand Inventory
Economic Order Quantity Formula
Dependent Demand Inventory
Inventory Objectives
Enterprise Resource Planning
Recap
Review Questions
Chapter 6 Why Inventory Systems Fail and How to
Fix Them
Inventory system Failure: A Case Example
Discussion of Example Case
Metrics
Inventory Record Accuracy
Fill Rates
Tools with Which to Uncover System
Dysfunctions
Run Charts
Flow Charts
Logic Charts
Variance Reports
Cycle Counting
Annual Inventories
Cycle Counting
Cycle Count Methodologies
Control Group Cycle Counting Method
Location Audit Cycle Counting Method
Random Selection Cycle Counting Method
Diminishing Population Cycle Counting
Method
Product Categories Cycle Counting
Method
A-B-C Analysis Cycle Counting Method
When to Count
Who Should Count
Recap
Review Questions
Chapter 7 Basics of Supply Chain Risk Management
SCM in a Perfect World
Primary Risks in SCM
Globalization and Supply Chain Complexity
Conflicting Interests
System Fluctuations Over Time
Evolving Relationships
Product Complexity
Inadequacy of Insurance
Suppliers
The Bullwhip Effect
Disruption in Communications
Inadequate Software
Suggested Solutions to SCM Problems
Analysis of Risks
Supplier Assessment
Lessen the Bullwhip Effect through Coordination
Within the Supply Chain
Contracts That Do and Don't Coordinate the
Supply Chain
Inventory Levels
Recap
Review Questions
Bibliography
Index
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