Risk Mitigation of SGU in Sugar Plant Using Fuzzy Digraph and Matrix Approach

The objective of this chapter is to apply risk management framework for risk identification and analysis of steam generating unit (SGU) in sugar plant. Only internal operational risks were considered for analysis. The expert discussion and fish bone diagram were used for identification and presentation of operational risk, and in the second phase risk analysis was done for the failure causes identified. The conventional failure and mode and effect analysis (FMEA) was used for risk analysis. The uncertainties arising from biased and faulty judgements were removed by integrating fuzzy methodology in the analysis process. Fuzzy multi-attribute decision-making method (MADM)-based risk analysis was carried out to eliminate discrepancies. The fuzzy digraph and matrix approach (FDMA) was used to evaluate the risk factors and its interdependencies. The results of the analysis were compared for getting insights into the process of analysis by conventional and fuzzy-based approach. A mitigation plan was also prepared for the assistance of concerned persons. The output was shared with the concerned authorities for managerial action and implementation. The results showed a different point of view and understanding on risk priorities.