Book summary “Operations management”: summary

Introduction

You face the constant pressure of delivering goods and services faster, cheaper, and with higher quality. You must manage complex networks of global suppliers and customers. Your primary challenge lies in transforming inputs like labor, materials, and capital into valuable outputs. Poor operational choices lead to bloated inventories, missed customer deadlines, and wasted resources.

Roger G. Schroeder and Susan Meyer Goldstein present a comprehensive framework in Operations Management. Operations and supply chain management integrates your internal production activities with an external network of partners. You learn to align operational capabilities with overall business strategy. You design effective processes, control quality, and manage capacity, inventory, and supply networks.

The book structures this discipline across thirteen core chapters. You begin by examining strategy, product design, and process selection. You then explore analytical techniques, lean production systems, and quality management. Finally, you study planning functions, demand forecasting, aggregate capacity planning, inventory control, and supply chain design.

As you read this book, you will find answers to several fundamental questions:

• How do you align operations strategy with overall business goals?
• What methods eliminate waste and improve flow in manufacturing and services?
• How do you apply statistical tools to achieve near-zero defect rates?
• What techniques balance capacity, inventory, and demand across the supply chain?

1. Introduction to Operations and Supply Chain Management

Operations and supply chain management integrates internal production processes with external network organizations to create goods and services.

The field has evolved through distinct phases. Production management focused strictly on manufacturing within factory walls. Operations management expanded to cover both manufacturing and services. Today, operations and supply chain management includes sourcing, distribution, and external partner relationships.

Definition of Operations and Supply Chain Management

You must recognize how work distributes across the modern economy. For example, 80 percent of the U.S. workforce is employed in service industries.

The Role of Operations and Supply Chain Management

Productivity improvement and innovation driven by operations are key factors in achieving economic growth. Productivity is measured as output divided by inputs in constant dollars. Economic growth relies on producing more output from fewer resources, coupled with new product development.

Henry Ford used better production line design and labor training to produce reliable automobiles at low costs.

An annual computation often balances multiple financial factors:

• 1.6 percent productivity increase achieved by operations in the text's annual computation example;
• 3 percent annual labor inflation;
• 2 percent annual output inflation.

Operations as a Process

All organizational work can be viewed as a transformation system that converts inputs into outputs. Inputs such as energy, materials, labor, capital, and information are converted through methods and equipment.

A bank transforms tellers, staff, computer equipment, facilities, and energy into financial services. Apple manages a complex global network of operations and supply chains across international borders.

2. Operations Strategy and Competitive Advantage

Operations strategy rests on four core internal elements that must align with the overall business strategy to create a competitive advantage.

The heart of operations strategy consists of the mission, objectives, strategic decisions, and distinctive competence. These elements must be tightly integrated with each other and with marketing and finance.

Southwest Airlines achieves financial success by maintaining a consistent business and operations strategy. It flies only Boeing 737 aircraft, uses secondary airports, and executes quick turnaround times. In 2018, Southwest Airlines operated 706 aircraft, all being Boeing 737s. The company generated $3.5 billion in net income on $21 billion in revenue, and reported a 25.9 percent annual return on invested capital.

Operations Strategy Model

Operations objectives serve as long-range, quantitative performance goals based on cost, quality, delivery, and flexibility. These four competitive priorities translate the operations mission into measurable goals over a 5 to 10 year horizon. Benchmarking against world-class competitors helps you assess your operations performance.

For instance, your current manufacturing cost might stand at 55 percent as a percentage of sales, compared to a 52 percent objective. A world-class competitor achieves 50 percent. Customer satisfaction might reach 85 percent, compared to a 99 percent objective.

Cross-Functional Strategic Decisions

Market success requires identifying order winners that drive customer choice and order qualifiers that meet minimum thresholds.

• For Walmart, low cost is the order winner.
• For Nordstrom, upscale merchandise and customer service drive the choice.

Insufficient performance on qualifiers causes lost business. You must also align your strategies with either a product imitator or a product innovator business strategy. Product imitators compete in mature markets with standardized products where low cost is vital. Product innovators compete in emerging markets with customized products where flexibility takes precedence. Zara focuses on fast fashion and rapid supply chain replenishment rather than low cost.

Supply Chain Strategy

Supply chain strategies must match product demand characteristics, dividing products into imitative or innovative categories. Imitative products feature predictable demand and low margins, requiring efficient supply chains. Innovative products feature unpredictable demand and high margins, requiring flexible supply chains with buffer capacity. Innovative products face an average forecast error of 40% to 100%, compared to 10% for imitative products.

Sport Obermeyer faces high demand uncertainty because up to 95 percent of its skiwear is new each year. The firm achieved a 60 percent increase in profits through better forecasting and capacity management.

3. New Product Development and Design

New product development proceeds through concept development, product design, and pilot testing, utilizing concurrent engineering and quality function deployment.

New Product Development Process

The typical new product development process consists of three distinct phases. Concept development involves idea generation and evaluating approaches without physical design. Product design creates physical specifications, drawings, and prototypes using CAD tools. Pilot production tests prototypes and finalizes production processes before full-scale manufacturing.

Modular design allows firms to offer high product variety while maintaining low component variety. Operations standardize equipment and processes while the supply chain manages fewer distinct parts.

A large bed manufacturer used four sizes, three spring arrangements, three foam thicknesses, and eight covers to create 288 possible mattress designs with minimal component types.

Cross-Functional Product Design

Concurrent engineering uses simultaneous, overlapping phases and cross-functional teams to shorten development time. Sequential engineering has functions work in isolation like a relay race. Concurrent engineering involves marketing, engineering, and operations simultaneously, resembling a rugby team moving together.

NASA uses concurrent engineering extensively at its Integrated Design Center with cross-functional teams to develop space tools.

Quality Function Deployment

Quality function deployment uses a matrix called the house of quality to link subjective customer attributes to measurable engineering characteristics. QFD translates ordinary language from customer research into technical specifications understood by engineers.

The Mitsubishi shipyard in Japan first used QFD in 1972 before it spread to Toyota and American companies.

4. Process Selection and Mass Customization

Product-flow processes range from continuous flow to unique projects, while mass customization achieves high volumes of custom products at near mass-production costs.

Product-Flow Characteristics

Operations management classifies product-flow processes into five distinct types based on volume and standardization. Continuous processes and assembly lines handle high volumes of standard products. Batch, job shop, and project processes manage lower volumes and customized work requiring skilled labor.

An oil refinery uses a continuous process. A metal bracket creation uses an assembly line. Furniture making uses a batch process. Building large aircraft like Boeing uses a project process.

A modern semiconductor wafer plant requires a $2 billion initial investment. An automobile assembly plant costs $1 billion and produces 350,000 automobiles a year on a two-shift basis.

Approaches to Order Fulfillment

You fulfill customer demand using make-to-stock, make-to-order, or assemble-to-order strategies.

• Make-to-stock focuses on inventory replenishment and is measured by service level or fill rate.
• Make-to-order begins after customer request and is measured by lead time and delivery schedule.
• Assemble-to-order acts as a hybrid, maintaining stock of subassemblies that are quickly put together once an order arrives.

Culver's restaurants use make-to-stock for daily soups, make-to-order for ButterBurgers, and assemble-to-order for desserts. The chain operates 700 plus Culver's restaurants in the U.S. Make-to-stock processes target a 90 to 99 percent service level. Allen-Bradley ships 300 different configurations for motor starter units in one day.

Mass Customization

Mass customization achieves high volumes of custom products at near mass-production costs by leveraging economies of scope. You rely on a common process rather than a common product. Flexible automation, computers, modular design, and the internet make this possible.

Paris Miki designs custom eyeglasses using digital photos and assembles frames and lenses within one hour. Nike offers online customized athletic shoes with various color choices.

5. Service Process Design and Management

Services differ from manufacturing due to intangibility, simultaneous production and consumption, and customer contact variability.

Defining Service

Services are fundamentally different from manufactured products due to intangibility and simultaneous production and consumption. Because production and consumption happen at the same time, customers participate directly and introduce uncertainty. Services cannot be transported or stored in inventory.

Operations managers divide service environments into the front office and the back office. The front office interacts directly with the customer. The back office operates out of sight to process behind-the-scenes work.

Service Delivery System Matrix

The service delivery system matrix aligns customer wants regarding customization with operational pathways. Crossing customer needs with the number of delivery pathways yields three service types:

• customer-routed services;
• co-routed services;
• provider-routed services.

Service process design is driven by customization rather than volume. A grocery store self-checkout represents a provider-routed service with limited pathways. A personal trainer offers a customer-routed service.

Service Profitability and Employees

Higher levels of customer contact increase process inefficiency by introducing variability into operations. Customer-introduced variability can be categorized into arrival, request, capability, effort, and subjective-preference types.

Hospitals handle patient capability variability by hiring lower-wage staff to assist with basic needs while reserving expensive nurses for specialized tasks.

The service-profit chain links internal service quality and employee satisfaction directly to customer loyalty and profitability. Front-line employees create high external service value. A 5 percent increase in loyal customers can increase profits in many industries by 25 to 85 percent.

Gary Loveman, former CEO of Harrah's, revolutionized the gaming industry by focusing on exceptional customer service for all guests. Ritz-Carlton front-line employees are authorized to spend up to 2,000 dollars to satisfy a customer need.

6. Process Analysis and Redesign

Process thinking views all work as a system consisting of boundaries, inputs, outputs, suppliers, customers, and flows.

A business organization functions as a collection of interrelated elements and processes. Specifying system boundaries is necessary to separate the process being analyzed from the broader organization.

A bank installing a new information system forms a cross-functional team including human resources and operations to maintain a systems view.

Process Analytics

Little's Law mathematically links the average number of items in a system to the average arrival rate and throughput time.

The formula states that inventory equals the arrival rate multiplied by throughput time. This applies to any steady-state transformation process including manufacturing and service lines.

At airport security, if screeners process 5 passengers per minute and throughput time is 20 minutes, the average number of passengers in the system is 100.

The capacity of an entire process is constrained by its most limiting resource, known as the bottleneck. Process analytics uses capacity, supply, and demand variables to determine the actual flow rate, which is limited by the smallest resource capacity or customer demand.

At Pizza U.S.A., the oven can bake up to 4 pizzas at a time taking an average of 6 minutes per order, establishing a capacity of 10 orders per hour and acting as the primary bottleneck. Operations also involve 2 employees and 7 different topping choices.

Process Redesign

Radical process redesign requires a complete reconfiguration of workflows, supported by information technology, to achieve major performance breakthroughs.

Instead of small step-by-step improvements, radical redesign reorganizes work around specific structural rules:

• organizing around outcomes;
• having workers process their own information;
• placing decision points where work is performed;
• eliminating unnecessary steps.

A major insurance company replaced its fragmented departmental routing system with cross-trained customer service representatives who handle requests directly using standard scripts and computer protocols.

7. Lean Production and Waste Elimination

Lean production originated at Toyota due to resource scarcity after World War II, shifting mass production into a system focused on waste elimination and small batches. Faced with low demand and severe resource shortages, you reject traditional U.S. mass production methods that rely on large batches and high inventory. Instead, you develop the Toyota Production System and Just-In-Time manufacturing to minimize scrap, rework, and storage.

Lean systems focus on eliminating eight forms of waste, stabilizing master schedules, and utilizing kanban pull systems for smooth production flow.

Womack, Jones, and Roos studied JIT manufacturing and popularized lean production in their book The Machine That Changed the World, reporting massive performance edges in the best plants. They observed a 2 to 1 labor productivity factor between best and worst plants, alongside only 2 hours of inventory maintained in best plants compared to two weeks previously.

Lean thinking is structured around five core tenets that guide organizations in efficiently delivering customer value. The five tenets require:

• specifying customer value;
• identifying and improving the value stream;
• ensuring simple and smooth flow;
• producing only what is pulled by the customer;
• striving for continuous perfection.

Lean systems identify and systematically eliminate eight specific forms of waste that add costs without providing customer value. Taiichi Ohno originally identified seven wastes: overproduction, waiting time, unnecessary transportation, excess processing, too much inventory, unnecessary motion, and defects. Womack and Jones added an eighth form: the underutilization of workers. In many processes, only 5 to 10 percent of total throughput time adds value for the customer. Taiichi Ohno served as Toyota's former chief engineer and is recognized as the father of the TPS.

Instead of pushing inventory based on forecasts, a kanban system halts production at a work center once its fixed output containers are full, waiting for a downstream workstation to pull parts and return an empty container. When 8 containers holding 20 parts each are used, you maintain 160 units maximum inventory. You use production cards, withdrawal cards, and kanban squares to control the flow of production by authorizing work only when pulled by a downstream customer.

8. Quality Planning, Control, and Improvement

Quality requires meeting customer requirements through rigorous control costs, mistake-proofing, and foundational principles from quality pioneers.

Only the customer can determine if a product or service provides the right benefits based on its total features and characteristics. Customer satisfaction is a relative measure of how well the quality matches expectations. This satisfaction can be influenced by advertising, product usability, and changing over time. Fitness for use dictates whether a product or service is truly usable.

Product Quality

Product quality for manufactured goods is evaluated across four distinct dimensions. You must balance each dimension to ensure complete customer satisfaction over time.

• Quality of design
• Quality of conformance
• The abilities
• Field service

Quality of design is determined before production via market research and specifications. Quality of conformance reflects whether the product meets those specifications during manufacturing. The abilities encompass availability, reliability, and maintainability over time. Field service covers post-sale support, maintenance, and repairs.

You can calculate availability using specific performance metrics. Consider an 80 percent availability for a product with an MTBF of eight hours and an MTTR of two hours.

Cost of Quality

The cost of quality breaks down into control costs and failure costs. This division provides a powerful financial incentive for investing in prevention.

• Prevention costs
• Appraisal costs
• Internal failure costs
• External failure costs

Control costs include prevention and appraisal, while failure costs include internal and external failures. Investing in prevention activities generates disproportionate savings in failure costs and flows directly to the bottom line.

Companies typically spend 30 percent of sales on the cost of quality, with a normal range from 20 to 40 percent. Best-managed companies achieve 5 percent of sales after reducing quality costs.

Quality Pioneers

Quality pioneers W. Edwards Deming and Joseph Juran revolutionized modern quality management. They emphasized statistical control, management responsibility, and continuous improvement over mass inspection.

Deming outlined 14 management principles focusing on systemic causes of variation, leadership, and removing workplace barriers. Juran introduced the quality trilogy consisting of planning, control, and improvement.

9. Statistical Process Control and Six Sigma

Statistical process control uses control charts and capability indices to maintain stability, while Six Sigma targets near-zero defect rates via DMAIC.

Process Quality Control

Statistical process control uses control charts to distinguish between random natural variation and assignable causes of variation to maintain a process in statistical control. Control charts feature a center line representing the process average, along with upper and lower control limits typically set at plus or minus three standard deviations from the mean, encompassing 99.74 percent of random variation. When points fall outside limits or show trends, the process is stopped to find assignable or special causes.

At Midwest Bolt Company, six-bolt samples were measured for diameter to evaluate whether the process was in control. Data entry quality control also used 200 records sampled at two-hour intervals, with a 1.27 percent average percentage in error establishing the control chart center line.

Process Capability

Process capability measures whether a statistically stable process can meet customer technical specifications by comparing specification width to process variability width. The Cp index calculates the ratio of specification width to six standard deviations, but it assumes the process is centered. The Cpk index accounts for lack of centering by evaluating each half of the normal distribution and taking the minimum, making it more accurate for industrial application.

A cereal manufacturer and an insurance claims-processing department evaluated their process means, ranges, and capability indices. Process capability yields specific defect rates depending on the index value:

• 2600 parts per million defect rate when Cp equals 1;
• 33 parts per million defect rate when Cp equals 1.33;
• 6 standard deviations used for process width calculation.

Six Sigma

Six Sigma is a structured methodology aimed at achieving near-zero defect rates through rigorous statistical analysis and the DMAIC project improvement cycle. Invented by Motorola, Six Sigma targets a defect rate of 3.4 parts per million. Projects follow the Define, Measure, Analyze, Improve, and Control steps, led by full-time specialists called black belts with executive champions.

A factory assembling front-end tractor loaders analyzed hydraulic leaks using a Pareto chart and found that loose connections accounted for 46.8 percent of defects, while cracked connectors caused 31.8 percent across 2347 total inspected hydraulic units. Six Sigma Ranch & Winery applies Six Sigma techniques originally used in industrial manufacturing to vineyard site selection, pruning, harvest, and fermentation management. Over 20 years, U.S. Fortune 500 companies saved over $400 billion through Six Sigma, with a typical project lasting 3 to 6 months.

10. Demand Forecasting and Planning

Forecasting drives organizational planning despite inevitable errors, utilizing exponential smoothing, causal regression, and collaborative supply chain planning.

Forecasting Basics

You must make decisions before actual customer demand materializes. Because forecasts are almost always wrong, you accommodate errors by improving forecasts, building operational flexibility, or reducing the forecasting time horizon. You should always include a best estimate and a measure of forecast error.

You encounter variations when a forecast predicts 100,000 cases of a product while customers actually purchase 80,000 cases. You track forecast error, bias, and absolute deviation to understand these discrepancies.

Time Series Analytics

Simple exponential smoothing reduces the amount of past data needed by updating an old average with the most recent demand using a weighting factor. The smoothing constant alpha controls responsiveness. You apply larger alpha values when you want to react more quickly to recent demand changes, or smaller values to maintain stability.

Mathematically, weights on past demands decrease exponentially. You typically give smoothing constant alpha values between .1 and .3 for reasonable stability.

Collaborative Planning

Collaborative planning, forecasting, and replenishment enables supply chain partners to share information and resolve forecast discrepancies. By exchanging forecasted demands and promotional plans, customers and suppliers eliminate hidden surprises and generate an agreed joint forecast for inventory replenishment.

West Marine increased forecast accuracy by 85 percent and achieved 96 percent in-stock product rates during peak season after 10 years of using CPFR with 200 major suppliers. You utilize replenishment planning to coordinate these activities across complex multi-tier networks.

11. Capacity Planning and Aggregate Management

Capacity planning balances long-term facilities strategy with medium-term sales and operations planning using level or chase strategies.

Capacity decisions follow a three-tier hierarchy. Long-range facility planning acquires physical capacity requiring 1 to 5 years lead time. Medium-term aggregate planning sets workforce levels and production output within those fixed facilities. Short-term scheduling allocates available capacity to specific activities and provides feedback loops upward to revise higher-level plans.

Facilities Decisions

Long-range facilities strategy requires addressing the amount, size, timing, location, and type of facility while choosing between preemptive and wait-and-see expansion. Preemptive strategies involve building capacity in advance of market demand to capture market share and discourage competitors. Wait-and-see strategies lag market demand until the need is certain, carrying lower risk but potentially sacrificing market share.

Facility types vary according to organizational focus:

• 55 percent of Fortune 500 companies use product-focused facilities;
• 30 percent use market-focused facilities;
• 10 percent use process-focused facilities;
• 5 percent use general-purpose facilities.

Apple built massive capacity and inventories in advance of new product launches for the iPad and iPhone. U.S. auto companies followed a wait-and-see strategy for small cars.

Sales and Operations Planning

Sales and operations planning acts as medium-range aggregate planning that matches supply and output with fluctuating market demand over a twelve-month horizon. Conducted using product families to limit complexity, S&OP decouples demand from supply through a cross-functional team approach involving marketing, finance, human resources, and operations. You result in regular updates on a rolling horizon across a 6 to 18 months time frame.

Hostess Brands relaunched with new S&OP processes and supply chain designs, collaborating closely with retailers to forecast demand and manage short shelf-life products. This initiative supported an 80 percent increase in new product offerings. Syngenta applied these methods across 28,000 employees serving 90 countries.

Aggregate planning relies on two primary extreme strategies or combinations thereof. A level strategy keeps workforce output constant and absorbs demand variations via inventory, overtime, or subcontracting. A chase strategy alters workforce size dynamically through hiring and layoffs to match monthly demand exactly without carrying inventory.

Travelers Insurance uses a level strategy, deploying claims professionals across regions during major disasters like Hurricane Irma and shifting staff to training during slow periods. Travelers contacted most Hurricane Irma-affected customers within 48 hours, and 90 percent of claims were inspected, paid, and closed within 30 days.

12. Inventory Management and Control Systems

Inventories buffer against supply chain uncertainties, with independent demand managed via Economic Order Quantity models and dependent demand via MRP.

Inventories require different management systems depending on whether customer demand is driven by external markets or internal production schedules.

Independent demand is driven by external market forces and requires replenishment, whereas dependent demand relates directly to production schedules for higher-level items. Independent demand requires forecasting and a replenishment philosophy where stock is reordered as it is consumed. Dependent demand exhibits a lumpy pattern and uses a requirements philosophy, ordering materials only as scheduled by production.

Demand for toy wagons is independent and must be forecast, but demand for wagon wheels is dependent because each wagon requires four wheels.

Economic Order Quantity

The Economic Order Quantity formula balances annual ordering costs and annual carrying costs to find the optimal batch size. The EOQ model relies on assumptions of constant demand, known fixed lead time, no stockouts, single-lot delivery, constant unit cost without discounts, and independent items. The total cost curve is flat near the minimum, allowing managers flexibility.

A carpet store manager uses the EOQ formula to determine an optimal order size of 40 yards of carpet. A 25 percent increase in order quantity results in about a 2.5 percent increase in total cost.

A continuous review system monitors stock position constantly and places a fixed order quantity whenever inventory drops to the reorder point. Also known as the Q system, it determines the reorder point by adding average lead time demand to safety stock calculated using a normal distribution service factor z.

Cantaloupe Systems uses seed devices inside vending machines to transmit wireless transaction data, acting like a continuous review system. This setup generated an average annual savings per route of $35,000 and a 40 percent reduction in fuel consumption.

Materials Requirements Planning

Materials requirements planning is a computerized planning and control system that manages complex manufacturing inventories with dependent demand. An MRP system uses several key inputs:

• a master schedule specifying final product timing;
• a bill of materials listing required components;
• inventory records of items on hand or on order.

The central parts-explosion process derives all future component demands mathematically and offsets them by lead times to generate purchase orders and shop orders. A company making skateboards with a deck, four wheels, and two axle units uses MRP to plan parts arrivals exactly when needed for final assembly.

Enterprise resource planning systems integrate basic MRP operations with finance, accounting, marketing, sales, and human resources through a common database. By linking all core business functions, ERP systems eliminate functional silos and track transactions from customer order entry through operations, accounting, and human resources. While offering cross-functional visibility and standardized processes, ERP implementations are expensive, time-consuming, and carry a risk of failure.

LG Electronics implemented a centralized ERP system to overcome unclear reporting and lack of transparency across its 114 subsidiaries, 82,000 employees, and 40 countries. Avon spent 125 million dollars before abandoning its ERP implementation in 2013 due to severe execution difficulties.

13. Supply Chain Design and Logistics

Supply chain management optimizes flows across entities, mitigating the bullwhip effect while balancing total cost analysis and global logistics.

Bullwhip Effect

Order variability and inventory levels become increasingly magnified for upstream entities moving farther away from actual market demand. This phenomenon is known as the bullwhip effect, also called the accelerator effect.

Demand forecast inaccuracies, replenishment lead times, and delayed information sharing cause the effect. Human behavioral patterns such as safe harbor over-ordering and inventory panic cuts further amplify the problem.

Simulation studies analyzing human behavior amplification used 4,000 participants. Procter & Gamble executives first observed this effect when ordering baby diapers, noticing extreme order variance at factory and wholesale levels despite stable consumer demand.

Supply chain resilience measures a network's capacity to plan for, detect, and swiftly recover from unexpected disruptions through strategic risk mitigation. Aggressive lean manufacturing and minimal inventories often decrease resilience. You evaluate risk by comparing a supplier's time to recover against the maximum time it can match supply and demand using available inventory.

The March 2011 Japanese earthquake and tsunami devastated Toyota's lean supply chain, dropping production and sales by 21 percent due to severe parts shortages. Ford calculated a 2.5 billion dollars profit impact across its supplier network from similar vulnerabilities.

Importance of Sourcing

Purchasing savings drop directly to the bottom line, offering a much higher leverage on earnings than increasing sales. This is known as the profit leverage effect.

Cost of Goods Sold represents a large portion of corporate expenditures. Saving a dollar in purchasing reduces costs by a full dollar. Increasing sales requires a massive volume expansion to achieve the same net earnings impact due to thin profit margins.

Target achieved pretax earnings of $3,710 million on $71,880 million in sales with $50,870 million in COGS, yielding a profit margin of 5.2 percent.

You must protect your core competencies in-house and only outsource non-core activities where external advantages outweigh the risks. Core competencies provide sustainable competitive advantages because they are valuable, difficult to imitate, and hard to replace. Everything else is a candidate for outsourcing if external suppliers offer cost, quality, or technological advantages.

Dell outsources component manufacturing to global suppliers like Intel, LG, Samsung, and Microsoft, but keeps final assembly, computer design, and brand management in-house.

Transportation Economics

Transportation economics relies on spreading fixed costs through economies of scale, distance, and speed. U.S. freight moves 17.7 billion tons of goods annually with an 18 trillion dollar value, averaging 55 tons of freight per person.

• Larger shipments cost less per unit.
• Longer distances cost less per mile.
• Slower shipments cost less than expedited ones.

A company shipping strawberries and watermelons from California to Las Vegas saved money by consolidating separate loads into a single truck.

10 Key Ideas

1. Operations strategy rests on four core internal elements that must align with the overall business strategy to create a competitive advantage.
2. New product development proceeds through concept development, product design, and pilot testing, utilizing concurrent engineering and quality function deployment.
3. Product-flow processes range from continuous flow to unique projects, while mass customization achieves high volumes of custom products at near mass-production costs.
4. Services differ from manufacturing due to intangibility, simultaneous production and consumption, and customer contact variability.
5. Process thinking views all work as a system consisting of boundaries, inputs, outputs, suppliers, customers, and flows.
6. Lean systems focus on eliminating eight forms of waste, stabilizing master schedules, and utilizing kanban pull systems for smooth production flow.
7. Quality requires meeting customer requirements through rigorous control costs, mistake-proofing, and foundational principles from quality pioneers.
8. Statistical process control uses control charts and capability indices to maintain stability, while Six Sigma targets near-zero defect rates via DMAIC.
9. Inventories require different management systems depending on whether customer demand is driven by external markets or internal production schedules.
10. Supply chain management optimizes flows across entities, mitigating the bullwhip effect while balancing total cost analysis and global logistics.