A small boost against costly errors
On a repetitive production line, attention can drift even when the task itself is simple. A missed step or faulty assembly may waste materials, slow the next worker, or require a product to be repaired. Employers therefore had a practical reason to value anything that could help workers stay alert—not just work faster.
Caffeine offered a modest, familiar tool. It blocks some of the brain’s adenosine signals, which normally build a sense of sleepiness. That can make a tired person feel more awake for a while, though it does not erase fatigue or affect everyone in the same way.
Why provide the drink at work?
The calculation was about costs and control of the workday. If a hot caffeinated drink helped reduce lapses, its price could be small compared with the time and materials lost to mistakes. Providing it at the workplace also made the boost available where and when production needed it, rather than leaving workers to find it elsewhere.
That did not make caffeine a substitute for rest, training, or sound equipment. It was a low-cost support for attention, with a limit: a drink might help a worker remain alert, but it could not make an exhausting shift harmless. The striking part is how directly a cup of coffee could enter the production budget—as an input intended to protect the work coming off the line.
