It is important to analyze the cause of an accident so as to prevent further incidents of a similar kind. Variation Tree Analysis (VTA) and Why-Why analysis are accident investigation methods to analyze an accident due to human factors in Mitsubishi Chemical Corporation. VTA is the method to employ time series analysis of the circumstances at the time of an accident. with particular e... https://www.roneverhart.com/Frostie-Diet-Root-Beer/