Latest / The Operations Podcast with Fexingo: Process, People, and Profit in Modern Business / How Boeing Built the 787 Dreamliner Assembly Line
Transcript
- Lucas: If you've ever watched a plane being built — and I mean really watched, not just the time-lapse videos — you know the traditional method is basically a cathedral of stationary work. The aircraft sits in one spot, and everything comes to it. Tools, parts, people. For decades, that's how Boeing built its widebodies. The 777, the 747. Then came the 787 Dreamliner, and they decided to blow that model up. Luna: Blow it up how? They didn't just change the materials — composite fuselage instead of aluminum. They changed the entire production philosophy, right? Lucas: Exactly. The 787 program was Boeing's bet on a global supply chain and a moving assembly line — both at the same time. And I want to focus on the assembly line piece, because it's a masterclass in operational ambition. Boeing essentially said: we're going to build the most advanced commercial aircraft ever, using a production system borrowed from Toyota, with major sections built by partners on three continents, and then we're going to move the plane down a line while we assemble it. Luna: Which sounds great on a PowerPoint slide. But the execution — that's where things got interesting. And expensive. Lucas: Yeah, look, the 787 program is famous for its delays. First delivery slipped by more than three years. But the moving assembly line itself? That part actually worked. Let me give you the numbers. Before the 787, Boeing's Everett plant built the 777 on a stationary line — a plane would sit in one position for about 49 days. For the 787, they designed a moving line where the aircraft creeps forward at about two inches per minute. Total time in final assembly? They got it down to 11 days. Luna: Eleven days from what, 49? That's a 78 percent reduction. It's almost hard to believe. Lucas: It's real. And they did it by breaking the assembly into what they called 'positions' — like a car plant. The fuselage sections arrive from suppliers like Spirit AeroSystems in Wichita, Kawasaki in Japan, Alenia in Italy. They get joined in position one. Then the plane moves to position two for systems installation. Position three for interiors. Position four for testing. Each position has a takt time — the pace at which work must be completed to keep the line moving. Luna: And that's where the global supply chain becomes the critical variable. If a fuselage section from Italy shows up late, the whole line stops. Which, as I recall, happened a lot. Lucas: It did. The 787's supply chain was famously overstretched. At one point, Boeing had to buy back Vought's fuselage plant in South Carolina — that was 2008, I believe — because the supplier couldn't keep up. And there were fastener shortages, engineering changes mid-production. The moving line exposed every weakness in the supply chain. But here's the key insight: Boeing didn't abandon the moving line concept. They doubled down. They built a second final assembly line in North Charleston, South Carolina, specifically to have more control. And they invested heavily in supplier integration — basically embedding Boeing engineers at key partners to monitor progress in real time. Luna: So the moving line forced a level of supply chain discipline that Boeing hadn't had before. It wasn't just a manufacturing innovation — it was a supply chain management innovation too. Lucas: Right. And I think that's the real lesson from the 787. The moving line is elegant, but it only works if the entire system — from raw materials to seat upholstery — arrives on time and in specification. Boeing learned that the hard way. But once they got it working, the efficiency gains were undeniable. By 2015, they were building 10 Dreamliners per month. Compare that to the 777, which peaked at 8.3 per month on a stationary line. And the 787 is a more complex aircraft. Luna: Let's talk about one specific crisis that tested the line: the 2013 battery grounding. The entire 787 fleet was grounded for months because of lithium-ion battery fires. How did the assembly line handle that? Lucas: That's a great example. The battery issue wasn't a production problem — it was a design problem. But it rippled through the production system. Boeing had to retrofit all undelivered aircraft with a new battery containment system. They did it on the moving line, which meant they had to insert an additional position, or rather, they had to add work at multiple positions. The line didn't stop. They just adjusted the takt time temporarily and added overtime. That flexibility — the ability to absorb a major design change without shutting down — is actually a strength of the moving line. In a stationary system, you'd have to pull the plane out of position and schedule a separate rework area. Luna: Interesting. So the moving line isn't just about speed — it's about adaptability. You can add work content more easily because the plane is moving through a series of stations, and you can slot in extra tasks. Lucas: Exactly. And that's a point that often gets lost in the narrative about the 787's troubled launch. The moving assembly line itself was a success. The problems were mostly upstream — supplier readiness, design maturity, and Boeing's own decision to outsource too much too quickly. The production system they built is actually one of the most sophisticated in aerospace. And it's still evolving. The 787 line now uses automated guided vehicles to move the fuselage sections, laser alignment for joining, and real-time data tracking on every fastener installed. Luna: Before we go deeper, I want to touch on something. This show — and the whole Fexingo network — is ad-free. We deliberately don't run commercials. If you find these conversations valuable for your work or your thinking, and you want to support that choice, the link is buy me a coffee dot com slash fexingo. No pressure, just a way to keep it independent. Lucas: Yeah, it's a small thing that makes a big difference. And we appreciate everyone who does. Back to the 787 — one detail I love is how Boeing handled the fastener shortage. In 2008, they were missing something like 400,000 fasteners across the supply chain. The moving line was literally at risk of stopping. So Boeing sent teams to supplier factories to help them ramp up production. They even redesigned some fasteners to use common sizes. It was a classic operations scramble. Luna: That's the kind of firefighting that operations people live for. But it also shows that the moving line is a forcing function. You can't hide problems when the plane is physically moving down the line every day. Lucas: That's the Toyota principle of 'andon' — stop the line if there's a problem. Boeing actually installed andon cords on the 787 line. Workers can pull them to halt the line if they see a defect. But in practice, they rarely pull it because the cost of stopping a moving line with a $250 million aircraft on it is enormous. So instead, they have what they call 'off-line' work — tasks that can be completed after the plane leaves the main line, in a rework area. It's a compromise. Pure Toyota purists would say never compromise, but Boeing found that a hybrid model worked better for aerospace. Luna: So there's a tension between the ideal of continuous flow and the reality of complex manufacturing. Boeing found a middle ground. Let's talk about the workforce. How did the move to a moving line affect the people on the floor? Lucas: It required a huge cultural shift. Boeing's Everett workforce was used to building planes stationary — you had your tool box, your area, and you worked on that plane for weeks. The moving line meant you had to complete your tasks within a specific time window, then the plane moves. That's a big psychological change. Boeing invested heavily in training — they sent teams to Japan to study Toyota plants, they brought in lean manufacturing coaches. And they redesigned workstations so that all tools and parts are within arm's reach, to minimize walking. They measured 'touch time' — the percentage of a worker's day actually spent adding value. Before the moving line, it was around 30 percent. After, they got it above 50. Luna: Fifty percent touch time is still low compared to automotive, where it's closer to 80. But for aerospace, that's a big leap. And it shows how much waste there was in the old system. Lucas: Huge amounts. In the old 777 line, workers would walk an average of two miles per shift just fetching tools and parts. On the 787 line, they redesigned the layout so that everything is delivered to the point of use. Kits of parts arrive on carts that follow the plane down the line. Tools are shadow-boarded. It's all lean 101, but applied at a scale that most factories never attempt. Luna: And the results? Beyond the 11-day final assembly time, what other metrics improved? Lucas: Quality improved significantly. The moving line reduces the chance of damage because you're not constantly moving heavy equipment around a stationary plane. Boeing reported a 50 percent reduction in rework on the 787 line compared to the 777 line. Also, inventory turns improved — because parts arrive just in time, Boeing doesn't have to warehouse as many components. They estimate they saved hundreds of millions in working capital. Luna: But the 787 program overall lost money, right? Boeing has said it won't break even until sometime in the 2020s. So the operational success didn't translate to financial success. Lucas: That's the big caveat. The moving line was an operational triumph, but the program's economics were undermined by the development cost overruns — something like $32 billion in R&D, plus the penalties for late deliveries. The production system itself is efficient, but it can't fix a bad business model. Boeing essentially sold the planes at a discount to win launch customers, then had to absorb the cost of delays and redesigns. The moving line made the best of a difficult situation, but it couldn't make the program profitable on its own. Luna: So what's the takeaway for operations leaders? Is the Dreamliner moving line a model to emulate, or a cautionary tale? Lucas: I think it's both. The moving line is absolutely a model for any high-complexity assembly operation — not just aerospace. The principles of takt time, point of use delivery, and visual management are universal. But the cautionary tale is about boundaries. Boeing outsourced too much, too fast, without ensuring their suppliers had the capability to support a moving line. They also started production before the design was mature — which is death for a moving line, because every engineering change disrupts the flow. If you're going to adopt a moving line, you need design stability and a supply chain that's fully integrated. Otherwise, you'll end up with a very expensive, very fast way to build a flawed product. Luna: And yet, Boeing is now applying the same moving line concept to the 777X program. So they clearly believe in it. Lucas: They do. And they've learned from the 787. The 777X line uses even more automation, including robotic drilling and riveting. And they've kept more of the supply chain in-house. The moving line is here to stay at Boeing. It's a testament to the power of operations thinking — even when the business context is messy, the production system itself can be a competitive advantage. Luna: It's a good reminder that operational excellence doesn't guarantee commercial success, but it's probably a prerequisite for it. You can't fix a bad strategy with great operations, but you can make a good strategy unstoppable. Lucas: Well said. And the 787 line — for all its flaws — is proof that you can take a concept from automotive and scale it to one of the most complex products ever built. That's a remarkable achievement, and it changed aerospace manufacturing forever. The next time you fly on a Dreamliner, think about the line that built it — creeping forward two inches at a time.