Methods to reduce defects and waste.
Six Sigma reduces variation and defects (3.4 DPMO at 6σ) using DMAIC; lean eliminates waste (muda): overproduction, waiting, transport, over-processing, inventory, motion, defects. Tools: value stream mapping, 5S, kanban, kaizen, SMED. Lean Six Sigma combines both.
Toyota Production System popularised just-in-time and jidoka.
Six Sigma and lean methods reduce defects and waste, so they raise quality and cut costs in manufacturing and service work.
Methods to reduce defects and waste.
Six Sigma and lean methods reduce defects and waste, so they raise quality and cut costs in manufacturing and service work.
Define, measure, analyse, improve and control, which is the structured problem-solving cycle used in Six Sigma projects.
Overproduction, waiting, transport, over-processing, inventory, motion and defects, which lean seeks to eliminate.
Typical applications include reducing scrap rate on a machining cell by finding root causes, removing unnecessary walking and waiting from an assembly line and using a DMAIC project to improve a defect rate on a moulding line.
Study "Statistical process control" first (topic 34 of 102 in Manufacturing, Robotics & Systems). It covers the groundwork this topic builds on.
DMAIC. Takt time. Pull systems.
Toyota Production System popularised just-in-time and jidoka.
The next topic is "Process capability", which builds directly on this one.
It is classed as Beginner in Manufacturing, Robotics & Systems (topic 35 of 102). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.