What are the types of waste in business? Toyota determined that there are 7 types (Muda in Japanese), this has since been amended to 8. Waste reduction stems from these 8 types. The amount of waste increases to around 20 in an office environment. Surprising! Waste implies inefficiencies. The 80/20 Rule will find the biggest issues. Then Kaizen will create incremental improvement. Identify constraints and bottlenecks with the Theory of Constraints. This leads to capturing waste in the wilds of your production system. Measure and document the waste with Lean Management. Waste reduction will create more and more instances of waste. Learn how to prioritise.
Five Whys and its sister Five Hows is a brainstorming tool that drives you to the reasons behind something happening when it is not obvious (5 Whys problem solving) or a desired outcome (5 Hows strategy). Yellow Belt article