Supply Chains — What COVID Revealed

Why It Matters

Before 2020, most people in wealthy countries had no reason to think about supply chains. Goods arrived at stores. Orders appeared at your door. The complex web of factories, shipping, logistics, and inventory that made all of this possible was invisible — which was itself a measure of how well it was working.

COVID made supply chains visible by breaking them. Empty shelves where toilet paper had been. Used car lots with three cars where there had been two hundred. Hospital workers making masks out of garbage bags because surgical masks were not available. Waiting a year to buy a new dishwasher. The pandemic did not just slow down deliveries — it exposed how much of modern life depends on a complex, globally integrated production system that had never been seriously stress-tested.

The lessons that emerged were about the tradeoff between two things that had previously seemed compatible: efficiency and resilience. A highly efficient supply chain minimizes cost by minimizing inventory, sourcing from the cheapest producers, and eliminating all slack. A resilient supply chain has backup suppliers, safety stock, and excess capacity available in emergencies. In normal times, efficiency wins every financial comparison. In a crisis, resilience is what keeps you operating.

The policy response — the CHIPS Act of 2022, new rules about domestic production of critical medicines, efforts to diversify supply chains away from single-country dependence — reflects a genuine reckoning with what COVID revealed. These are expensive policies. The question is whether the insurance value of resilience is worth the cost, and that is a real economic debate with no obvious answer.

A Story

Three Cars on the Lot

In the summer of 2021, Marcus and his wife Yolanda needed a new car. Their 2013 minivan had 180,000 miles on it and needed an engine repair that would cost more than the car was worth. They had saved about $30,000 and planned to buy a new mid-size SUV with a comfortable margin left over.

They drove to the dealership where they had bought their previous vehicle. In a normal year, a large suburban dealer would have two hundred to three hundred vehicles on the lot. On this particular Tuesday in July 2021, the lot had three cars.

Three. Not three rows, not thirty. Three cars, widely spaced, looking almost absurdly lonely in a lot that stretched the size of a city block.

The salesman explained what had happened. The auto plants in Michigan and Kentucky that produced this brand of SUV were largely shut down or operating at reduced capacity. Not because of COVID directly — the workers were back. Because of semiconductors.

Modern cars contain 100 to 150 microchips — the small semiconductor components that control the engine, the transmission, the brakes, the navigation, the entertainment system, the backup camera, the climate controls. In ordinary times, automakers used just-in-time supply chains: they ordered chips from suppliers a few weeks before they needed them, kept minimal inventory, and relied on smooth continuous delivery.

When COVID disrupted semiconductor factories in Taiwan and South Korea in early 2020, automakers canceled their chip orders — expecting reduced demand. Meanwhile, demand for consumer electronics — laptops, gaming consoles, TVs — surged as people stayed home. Chip manufacturers shifted their capacity toward the higher-margin consumer electronics orders. When auto demand recovered faster than expected in late 2020, the chips were not available. The factories that make chips require years to build and cannot be quickly restarted.

So the plants that assembled cars had everything they needed except one component. Thousands of dollars of steel, aluminum, plastic, rubber, glass, leather, wiring, and labor sat idle because a $5 chip was not available. Some plants completed assembly of vehicles except for certain features and parked them in lots to wait for chips to arrive before they could be delivered.

Marcus and Yolanda could not find the SUV they wanted at MSRP — the manufacturer’s suggested retail price — within 300 miles of their home. Dealers with inventory were charging anywhere from $2,000 to $10,000 above sticker price. The used car market had gone equally haywire: the 2013 minivan they were trading in, which they had estimated at $4,000, was now being offered $8,500 for it, because the used car shortage was as acute as the new car shortage.

They eventually bought a slightly different vehicle from a dealer 200 miles away, paid $1,500 above MSRP, and considered themselves lucky. Friends who waited for their preferred model waited five to eight months for delivery. Some families needing a vehicle quickly paid $5,000 to $8,000 above sticker price and described it as having no choice.

The semiconductor shortage that began in early 2020 was not substantially resolved until mid-2022. In those two-plus years, auto prices rose dramatically, contributing to broader inflation. The US lost an estimated 1.5 million vehicle sales in 2021 alone due to production shortfalls.

Vocabulary

Just-in-time manufacturing

A production strategy that minimizes inventory by receiving parts and materials just before they are needed in the manufacturing process. Highly efficient in normal conditions; highly fragile in disruptions.

Supply chain

The full sequence of suppliers, producers, transporters, and retailers that brings a finished product from raw materials to the consumer. Modern supply chains often span dozens of countries and hundreds of companies.

Semiconductor

A microchip — a tiny electronic component made primarily from silicon that processes information. Semiconductors are essential to virtually every modern electronic device, vehicle, and piece of industrial equipment.

Reshoring

Moving manufacturing operations back to the domestic country from overseas. Often motivated by supply chain security, national security concerns, or policy incentives.

Resilience

The ability of a system to continue functioning through disruption. In supply chains, resilience typically means backup suppliers, safety stock inventory, and domestic manufacturing capacity — all of which cost more than a purely efficient system.

CHIPS Act

The Creating Helpful Incentives to Produce Semiconductors Act, signed into law in August 2022. It provided $52 billion in federal funding to encourage construction of semiconductor fabrication facilities in the United States, motivated by the strategic vulnerability revealed by the 2021 chip shortage.

Guided Teaching

Let’s start by understanding why supply chains became global and why they became so lean.

The efficiency argument was real and had been winning for decades. From the 1980s onward, corporations found that they could reduce costs dramatically by sourcing components from the cheapest producers globally, minimizing inventory, and coordinating delivery through sophisticated logistics. The technical term is just-in-time manufacturing, but the underlying logic is simple: don’t pay to store things you don’t need yet. Order exactly what you need, when you need it. This works brilliantly when everything is normal. It fails when something unexpected disrupts a single link in the chain.

Ask: imagine your family’s kitchen as a supply chain. A very efficient family might have no extra food — they buy exactly what they need each day. A more resilient family keeps a pantry with two weeks of supplies. Which family spends less on food in a normal month? Which family does better when there is a snowstorm, a job loss, or a pandemic?

The semiconductor shortage is the key case study. Semiconductors are made in very few places — primarily Taiwan (TSMC produces about 90 percent of the world’s most advanced chips), South Korea (Samsung), and a few other locations. The US used to be a major chip manufacturer — in 1990 it produced about 37 percent of global semiconductors. By 2020, it produced about 12 percent. The offshoring of chip manufacturing was efficient: Asian manufacturers invested heavily, achieved economies of scale, and could make chips much more cheaply than US factories. But when Taiwan was disrupted and demand surged simultaneously, there was no backup.

The PPE shortage revealed a similar pattern. Personal protective equipment — surgical masks, gowns, gloves, respirators — had been moved almost entirely to overseas manufacturing for cost reasons. The US had some strategic stockpiles, but they were not sized for a pandemic. When COVID hit and every country in the world simultaneously needed masks, the global supply chain could not meet demand. US healthcare workers improvised with garbage bags, bandanas, and single-use masks worn for days. The US government scrambled to place orders with domestic manufacturers who had to retool from making other things. It took months to establish adequate supply. People died in that gap.

The medicine supply chain is a less visible but equally serious concern. The US imports roughly 80 percent of active pharmaceutical ingredients — the chemical compounds that go into drugs — from China and India. If those supply chains were disrupted by a serious conflict or diplomatic breakdown, the US would face shortages of essential medicines, including antibiotics. This is a national security concern that most Americans are unaware of.

The efficiency-resilience tradeoff is real and there are no free solutions. Keeping more inventory, maintaining backup suppliers, manufacturing critically important goods domestically — all of these cost more than pure global efficiency. Someone has to pay that cost: the government (through subsidies like the CHIPS Act), companies (through higher operating costs), or consumers (through higher prices). There is no version of resilience that is free.

The CHIPS Act represents a specific policy judgment: that semiconductor manufacturing is important enough to US national security that paying a premium for domestic capacity is worth it. The $52 billion invested is intended to rebuild domestic fabrication capacity. Companies including Intel, TSMC (building Arizona facilities), and Samsung (building Texas facilities) have announced major US investments partly driven by this policy. Critics argue this is wasteful industrial policy that will saddle taxpayers with the cost of subsidizing what private markets should decide. Supporters argue that critical infrastructure should not be dependent on potentially adversarial foreign producers. Both arguments are serious.

The lesson is not that global supply chains are bad. The lesson is that pure efficiency optimization, applied without regard for resilience, creates brittleness. The response is not to abandon global trade but to think carefully about which goods are strategic enough to warrant the insurance premium of domestic capacity or supply diversification.

For Discussion

1. 1.What is just-in-time manufacturing, and why does it make supply chains fragile?
2. 2.In the car shortage story, why was a shortage of a $5 chip enough to stop production of a $40,000 vehicle?
3. 3.What is the difference between efficiency and resilience? Can you think of examples in everyday life where you choose one over the other?
4. 4.The US used to produce 37 percent of global semiconductors and now produces about 12 percent. Why did this happen, and why does it matter?
5. 5.What is the CHIPS Act, and what problem was it designed to address? What do critics of the policy say?
6. 6.The US imports about 80 percent of active pharmaceutical ingredients from China and India. Should this concern you? What would it take to change it?
7. 7.If making semiconductors domestically costs 30 percent more than buying them from Taiwan, is the extra cost worth it? How would you decide?

Practice

The Chain Tracing Exercise

1. 1.Pick one common household electronic device: a smartphone, a laptop, a television, or a game console.
2. 2.Research where it is assembled and where its three most important components are manufactured. Key components typically include the processor chip, the display, and the battery.
3. 3.For each component, identify the country of manufacture and, if possible, the specific company. You may need to look at the product specifications and do some online research.
4. 4.Now think through a disruption scenario: if one of those countries experienced a major earthquake, a war, or a trade embargo, what would happen to the supply of that device in the US? How long would it take to find an alternative source?
5. 5.Discuss with a parent: does knowing this change how you think about that device or about technology supply chains in general?

Memory Questions

1. 1.What is just-in-time manufacturing?
2. 2.What caused the semiconductor shortage of 2021, and what effect did it have on auto manufacturing?
3. 3.What is the difference between efficiency and resilience in a supply chain?
4. 4.What is the CHIPS Act, and what was the policy reasoning behind it?
5. 5.Why did the US have trouble producing masks and PPE at the start of COVID?
6. 6.What percentage of active pharmaceutical ingredients does the US import from China and India?