General Motors' Robot Debacle

TL;DR

GM spent an estimated $60 billion on factory robotics in the 1980s but failed because the technology wasn't ready and automation created as many problems as it solved.

Key Points

• 1.The industrial robot was invented by George Devol and commercialized by Joseph Engelberger through Unimation. The 1961 hydraulic Unimate arm, first deployed at GM in New Jersey for $18,000, could store 200 sequential movements and proved ideal for dangerous die-casting and spot-welding tasks.
• 2.GM's 1968 Chevrolet Vega was the first major test of factory robotics at scale. The Lordstown plant used 26 Unimate robots for 95% of 3,900 spot welds, but a 100-cars-per-hour production target cut worker time to 36 seconds per task, triggering an 18-day strike costing GM $141 million.
• 3.Sweden's ASEA revolutionized robotics in 1973 with the all-electric IRB-6. Powered by electric servo motors and Intel's 8008 microprocessor, it was smaller, quieter, and more precise than hydraulic robots, enabling finer tasks like arc-welding, painting, and assembly — opening the door to the Japanese 'workcell' concept.
• 4.GM and Unimation co-developed the PUMA robot in 1979 as a universal assembly solution. Weighing 92 kg and costing $25,000 over an 8-year life, it undercut human labor by ~$10/hour, but Unimation's failure to scale production and Engelberger's resistance to electric robots ended the partnership — GM had planned to buy 9,000 units.
• 5.The 1979 Iranian Revolution triggered a catastrophic sales collapse for American automakers. GM posted its first loss since 1921 ($763 million in 1980), Ford lost $3.3 billion over 1979–1982, and Chrysler required a $400 million government bailout — all while Japanese imports surged to 26.5% market share.
• 6.GM Chairman Roger Smith launched an aggressive $40 billion automation plan and a massive tech buying spree. Acquisitions included EDS for $2.5 billion, Hughes Aircraft for $5.2 billion, and stakes in five machine vision startups — alongside the 1982 launch of GMF Robotics, a 50-50 joint venture with Japan's Fanuc that became America's largest robot company by 1984.
• 7.GM's flagship Hamtramck plant opened in 1985 with 260 robots but immediately failed to meet targets. Spray-painting robots painted each other instead of cars, vision robots shattered windshields, automated rovers broke down for months, and the plant produced only 35 cars per hour instead of the expected 60 — automating just 5% of total assembly after a year.
• 8.The core technical failures at Hamtramck revealed that networked robots performed far worse than isolated ones. A too-slow vehicle identification system created assembly line gridlock, a PUMA robot screwed in lightbulbs far slower than a human to avoid breaking them, and the $60 billion spend ultimately saw GM's domestic market share fall from 48% in 1978 to 37% in 1986.
• 9.The NUMMI joint venture with Toyota proved that lean process principles beat expensive automation. Using only basic welding and painting robots — no computerized rovers or vision systems — Toyota's continuous improvement philosophy turned NUMMI into one of GM's most productive plants, while GM eventually sold its GMF stake to Fanuc in the early 1990s, elevating Fanuc to a top-tier global robot maker.