0cc94f64_Top_25_Lean_Tools__How_Does_It_Help_
[Lean Tool] PDCA (Plan, Do, Check, Act) [What Is It?] An iterative methodology for implementing improvements: Plan (establish plan and expected results) Do (implement plan) Check (verify expected results achieved) Act (review and assess; do it again) [How Does It Help?] 
Applies a scientific approach to making improvements: Plan (develop a hypothesis) Do (run experiment) Check (evaluate results) Act (refine your experiment; try again)
Top 25 Lean Tools
How Does It Help?