Chaku Chaku:

The term "chaku chaku" may sound funny to most of us, but it's serious business in Boeing's Portland, Ore., bevel gear-making organization.
Japanese for "load load," chaku chaku is an efficient style of production in which all the machines needed to make a part are situated in the correct sequence very close together. The operator simply loads a part and moves on to the next operation. Each machine performs a different stage of production, such as turning, drilling, cleaning, testing or sandblasting.
In the past, using the "job shop" method, these machines were located in separate areas of the factory, and each required a separate machinist to operate it. They turned out hundreds of parts in batches that were then loaded into baskets for transporting to another area or simply sat there in stacks waiting until they were needed or the whole batch was completed.
The machines in the new chaku chaku line are located in a U-shaped flow line. The machines eject the parts automatically and everything is timed just right, so the operators don't spend time unloading or waiting.

This flow line is assigned only those resources (equipment and labor) that are required for the specific activities to be performed. Included in the line are appropriate inspection tools to ensure no quality problems are passed on to the next operation.
Because each flow line is responsible for turning out a completed product, it is easier to keep track of how many parts are being produced and to stay on schedule.