Automation, Robots, Controls and the Smart Factory

Automation is the factor most often mistaken for another. Bought well, it raises process capability (a robot welds the same seam the same way every cycle), raises utilisation (a cell runs a third shift without overtime) and lowers unit cost; bought badly, it is a large fixed cost that makes a line less flexible, less reliable and harder to fix than the people it replaced. The world installed 542,076 industrial robots in 2024, more than half of them in China (~295,000), against 34,200 in the United States (−9% on 2023) and 30,600 in Korea (IFR World Robotics 2025, Sep 2025, reported). Measured by robots per 10,000 manufacturing employees, Korea leads at ~1,220 and the US is around 307, outside the top five (IFR, reported). The control layer that runs those robots and every other machine — programmable logic controllers, drives, sensors and safety systems — is a quieter, more profitable business dominated by Rockwell Automation in North America and Siemens in Europe. Two episodes bracket the US story: General Motors' 1980s automation spending, which did not close its gap with Toyota, and Tesla's 2018 Model 3 ramp, after which Elon Musk said "excessive automation at Tesla was a mistake" (Apr 2018) and the company reached 5,000 cars a week only in the last week of June 2018, partly on a line built in a tent (Energy: Tesla). In Europe the robot business itself is changing hands: ABB agreed on 8 Oct 2025 to sell its robotics division to SoftBank Group for an enterprise value of $5.375bn, with closing expected in mid-to-late 2026 (company; completion not confirmed at early Nov 2026 — verify). This section covers the automation stack from sensor to MES, controls and motion, industrial robots and cobots, machine vision, robot density by country, the economics of automating, over-automation and lights-out claims, AI and the "smart factory", and how to read automation claims. Humanoid robots and robot makers as businesses belong to a later Robotics vertical and are mentioned only in passing. There is no worked example: the main book's Appendix A reshoring example already computes the unit cost of an automated US cell against manual US, Mexican and Chinese production.