Ключевые слова: 4 steps, act, adjust, business, chart, check, circle, concept, continuous, control, cycle, deming, design, diagram, do, emphasis, fourstep, graphic, illustration, improvement, infographic, information, institute, iterative, management, manufacturing, marketing, method, pdca, plan, process, production, products, shewhart, study, system, technology, template, text, used, wheel,