Most factories do not lack ideas for improvement. They lack a quick way to match a problem with the right method, and this page does that job. It opens with a lean manufacturing toolbox of fifteen tools, from 5S and kanban to SMED, OEE and poka-yoke, each with a one-line use and a link to its method card. Below, the lean tools and techniques are grouped by what hurts: lean tools for waste reduction, ways to speed up flow and changeovers, and lean problem solving tools for variation and defects. Engineers who work with statistics will find the Lean Six Sigma tools they need, including DMAIC, control charts, FMEA and 8D. Another group covers lean and agile manufacturing, with robotics, digital twins and research feeds on automation. People and ergonomics get their own section, because tools fail when the behaviors behind them are missing. Eleven practical rules, equipment suppliers, universities, three belt courses with exams and nine answered questions on takt time, SMED, OEE and ...