ISM for analysing the safety of SRRMs

Interpretive structural modeling (ISM) is one of the well-established methodologies for identifying relationships among specific items, which define the problems of an issue. This approach has been increasingly used by various researchers to represent the interrelationships among various elements related to the issue. . In general, there exists a direct correlation between various customer receptivity aspects. Thus it makes more natural approach to this kind of problems. ISM approach starts with an identification of variables, which are relevant to the problem or issue. Then a contextually relevant subordinate relation is chosen. Having decided the contextual relation, a structural self-interaction matrix (SSIM) is developed based on customer receptivity of variables. SSIM is then converted into a reachability matrix (RM) and its transitivity is checked. Once transitivity embedding is completed, a matrix model is obtained. Then, the partitioning of the elements and an extraction of the structural model called ISM is obtained. In this paper, key concept of ISM approach is discussed about the hazardous situations of Steel Re Rolling Mills (SRRMs) in detail.