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What are the applications of derivatives in assessing the impact of natural disasters on global supply chains? This is a paper by C. S. Mathers which is being published in World Environmental Reports April 11, 2011. The paper as well as the summary of the paper by S. Wang, D. Dezer, P. van Helst, G. Stodfeldt, I. Fehr and D. Seo are adopted for the comment to the main work. An analysis of the impact of floods is the basis for deciding whether or not the management of flood control should be changed. Key findings: • For a flood-prone basin where the available supply (in our case, water) to the city is limited, flood control should be to fix a number of local indicators. • In a flood-prone basin, what…

How can derivatives be applied in predicting climate-related supply chain disruptions? Several climate model books have proposed practical applications of derivative-based models to predict supply chain disruption. With climate models, the amount of total knowledge that can be accumulated by a particular model is not known to a model which is forecasting. Therefore, it is desirable to discover a potential process which can estimate the amount of knowledge needed to predict the amount of knowledge generated. Studies using multiple approaches [e.g., [@lww]], [@elisaprin] and different techniques [i.e., [@lwwM] and [@gull1] show that there is no need to assume multiple degrees of freedom to predict supply chain disruptions following climate models. There are currently more than 1000 climate models available for predicting supply chain disruption of any magnitude. However, the techniques…