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Learn the lean lingo
Want to sound like a lean
manufacturing expert. Here is a primer on important terms.
Andon lights / boards: A visual
control device in a production area.
Autonomation: Automation with a
human touch. Refers to semi-automatic processes where the operator and
machine work together. Autonomation allows man-machine separation.
Also referred to as Jidoka.
Balanced production: All
operations or cells produce at the same cycle time. In a balanced
system, the cell cycle time is less than takt time.
Error-proofing: Designing a
potential failure or cause of failure out of a product or process.
Flow manufacturing: A
manufacturing methodology that pulls items from suppliers through a
synchronized manufacturing process to the end product. The principle
goal is faster response to customer demand.
Hoshin Kanri: A strategic
planning approach that integrates the practices of leadership with the
practices of management.
Kaizen: Japanese term for
incremental improvement. A team approach to quickly tear down and
rebuild a process layout to function more efficiently.
Kanban: Techniques named after
the Japanese word for card or communication. Stocking technique using
containers, cards and electronic signals to make production systems
respond to real needs, not predictions and forecasts.
Just-in-Time (JIT):
Manufacturing method where downstream operations pull required parts
needed from upstream operations at the required time. Implementing JIT
requires most features of lean manufacturing.
Mistake-proofing: Any change to
an operation that helps the operator reduce or eliminate mistakes.
Muda: Anything that interrupts
the flow of products and services through the value stream and out to
the customer is designated muda, or waste.
One-piece flow: Producing one
unit at a time, as opposed to producing in large lots.
Poka-Yoke: Techniques to
mistake-proof a process.
Six Sigma: A structured process
improvement program for achieving virtually zero defects (3.4 parts
per million) in manufacturing and business processes.
Standard operations: Clearly
defined operations and standardized steps for both workers and
machines.
Takt time: Takt is German for
pace. Takt time defines the manufacturing line speed and the cycle
times for all manufacturing operations. Takt time is computed as:
available worktime per day / daily required demand (parts/day).
Value Stream Mapping: A process
to determine the value added to a product as it goes through a
manufacturing process.
Sources include: Todd Phillips,
Advanced Manufacturing; Massachusetts Institute of Technology;
Rutherford Associates Inc.; AMR Research; University of
Alabama-Huntsville Manufacturing Extension Program; AIS Technologies;
Dr. Thomas Jackson, Productivity Inc.
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