Ключевые слова: 5 whys, analysis, background, business, cause, communication, concept, conceptual, data, design, effect, environment, failure, fault, faults, flat, glass, goal, guidance, idea, industrial, information, line, looking, management, medicine, message, method, methodology, outcome, paper, problem, problem solving, process, question, rca, reminder, resolve, risk, root, root cause, root cause analysis, search, solution, solving, strategy, success, symbol, text, word,