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Henry Ford's flow and waste principles

Updated 4 November 2026

Not affiliated with or endorsed by Henry Ford or their companies.

The Henry Ford museum credits Henry Ford with creating the moving assembly line in 1913, at the Ford Motor Company's Highland Park plant. In his 1922 book My Life and Work, written with Samuel Crowther, he set out the ideas behind it: bring the work to the worker, arrange people and tools in the order of the work, let the work move at a pace found by trial, and cut waste of materials and human effort. This page explains them from the book (now in the public domain in the United States) and The Henry Ford museum, and shows how to apply them to office and service work.

Bring the work to the worker

In Chapter V of My Life and Work, "Getting into Production", Ford describes the first way cars were built: at one spot on the floor, with workers bringing parts to it, the way one builds a house. He says that a worker without direction spends more time walking about for materials and tools than working. The change was, in the book's words, "taking the work to the men instead of the men to the work."

The same chapter lists three principles of assembly, paraphrased here:

• Place the tools and the people in the sequence of the operations, so each part travels the least possible distance while it is being finished.
• When a worker finishes an operation, the part goes to the same place each time, the place most convenient to the hand, and if possible gravity or a carrier takes it to the next person (by work slide or another carrier; by gravity where possible).
• Use sliding assembly lines that deliver the parts at convenient distances.

Ford adds two general rules: no one should have to take more than one step if it can be avoided, and no one should need to stoop. In Chapter VII he says machines were arranged in the sequence of operations, giving each job the room it needs and no more.

In an office, the trips are often clicks and messages rather than steps. A support agent who opens four tools to find an order before answering is walking to the work. Putting the order, the customer's history and the reply box on one screen brings the work to the agent.

The moving line: small first, paced by trial

Ford writes that the company first tried an assembly line around April 1913, on the flywheel magneto, and that he believes it was the first moving line ever installed; the idea came from the overhead trolley that Chicago meat packers used. The book says the company tries everything in a little way first and makes no drastic change until it knows the new way is better. From the magneto, the method spread to the motor and the chassis, and the book says the line came to assemble the whole car.

The speed was set by trial. On the magneto line the first speed was too fast, the next too slow, and a third was settled on. The stated idea is that a worker must not be hurried: "he must have every second necessary but not a single unnecessary second" (Chapter V).

The Henry Ford museum describes the result as combining interchangeable parts, subdivided labour and the fluid movement of materials. Its K-12 research guide says the first line of 1913 was crude, with workers pushing or pulling vehicles to each station, and that the slide method was later replaced with chain-driven delivery; the museum's assembly-line page puts that in the following year.

Waste of materials and effort

In the book's Introduction, Ford says he aimed to manufacture with a minimum of waste of both materials and human effort, and that waste comes largely from not understanding what one does, or doing it carelessly. In Chapter X, "How Cheaply Can Things Be Made?", he says the company found it not worth while to buy materials for more than immediate needs; if transport were perfect and the flow of materials even, no stock would be needed, and less money would be tied up in materials.

He applied the same idea outside the factory. Chapter XV describes a hospital where, he says, nurses in an ordinary hospital spend more time walking than caring for patients, so the building was designed to save steps.

A small example: a print shop orders two months of paper at a time, just in case, because deliveries are irregular. The book's logic points at the delivery, not the cupboard: steadier deliveries let the shop hold less paper and less cash in it.

How Ford relates to the Toyota Production System

Ford's book and Taiichi Ohno's work share an aim: cut waste and shorten the time from material to finished product. Ford's book focuses on flow and layout. Ohno's seven wastes give names to what you find (overproduction, waiting, conveyance, and so on); see Taiichi Ohno's 5 whys and seven wastes. Using both, you can follow the flow first, then name each loss. The comparison is ours, not something either source says.

How to apply it to your own work

1. Pick one process and follow one item from arrival to exit, writing work time and wait time for each step.
2. Mark every place where a person goes to the work: walking, searching, opening another tool, chasing someone.
3. Check that the steps are in the order the work is done, and count backtracks and handoffs.
4. Give each handoff one fixed, obvious place the next person takes the work from.
5. Compare the stock or backlog between steps with what the next step uses in a day.
6. Change one part first, measure before and after, and keep the old way until the new one is shown to be better.

What the sources say, and what they don't

The principles on this page come from Ford's own book, My Life and Work, published in 1922; its title page says it was written in collaboration with Samuel Crowther. Project Gutenberg lists the ebook as public domain in the USA and asks readers outside the United States to check their own country's laws; quotes here are short and name the chapter. The dates and descriptions of the line come from The Henry Ford museum, which also records that workers disliked the new methods: by late 1913 labour turnover was very high, and the museum connects that to the Five Dollar Day announced in January 1914. Applying the principles to offices and services, and the comparison with Toyota, are our adaptation.