Department of Mechanical engineering
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Item An AHP model for quantification of benefits of World-class Maintenance Systems(Inder Science, 2007-01) Mishra, Rajesh PIn recent times, organisations are failing in their attempt to adapt and implement Total Productive Maintenance (TPM). Researchers are attributing these failures to the shortcomings of TPM, which resulted in the development of World-class Maintenance Systems (WMS). Different frameworks have been proposed to define and operate world-class maintenance in the literature. A comparative analysis of frameworks in our earlier study revealed various best practices based on which a new framework for WMS has been proposed. Contemporary organisations willing to adapt WMS find it difficult to initiate such a change, as it requires proper justification to convince top management. Further, to initiate the adaptation of WMS as a policy decision, it is necessary to quantify the benefits of WMS. Hence in this paper, an attempt has been made to demonstrate the application of Analytic Hierarchy Process (AHP) for the quantification of benefits of WMS. This model showed that implementing WMS would result in overall improvement in the performance of an organisation.Item Packaging Plastic Waste Management for a Circular Economy and Identifying a better Waste Collection System using Analytical Hierarchy Process (AHP)(2021) Mishra, Rajesh POne of the biggest challenges for solid waste management systems is the ever-growing use and disposal of plastic materials which have severe repercussions on the environment and ocean. Linear economy (take, make, throw) recycles as little as 2 % of plastics globally, wasting the humongous amount of resources. This is high time for the implementation of the circular economy, especially among plastics. A circular economy would both maximize the merits of plastics and minimize their ill effects, through such actions as producing them from plants rather than fossil fuels; redesigning products to cut waste and make them last; boosting recycling and reuse, and utilizing plastic wastes as a resource; to name a few. Categorizing the post-industrial plastic waste can lead to differentiating recyclables, reusable from dead-end plastics. This will help us to reduce what we don’t need and reuse what we need. In this study, we are focusing on the plastic waste generated by packaging industry because they contribute the highest (almost 40%) of total plastic waste generated. A model for recycling the waste generated from packaging industry has been proposed which provides recycling of the waste in multiple levels i.e. we can extract the same product from the waste by high grade recycling of can use them in secondary operations like as charcoal, construction material. After that an AHP analysis has been prepared for identifying best plastic waste collection methods because for successful operation of recycling to happen, collection and proper segregation is a very important prerequisite. Results showed that Deposit and Refund method collection is best suited for waste collection method as it is supporting the concept of circular economy. At the end, a case study of successful implementation of Circular Economy is presented.Item Justification of world‐class maintenance systems using analytic hierarchy constant sum method(Emerald, 2009-03) Mishra, Rajesh PIn recent times, many organizations implementing total productive maintenance (TPM) have been failing in their attempts. Researchers attribute these failures to the shortcomings of TPM and of the implementing organizations. This paper aims to conduct a detailed study in order to understand these shortcomings and seeks to propose various solutions in the form of “best practices”, which leads to the development of world‐class maintenance systems (WMS). However, development of such alterative maintenance systems raises the following question: if an organization is planning to implement and improve their existing maintenance system then how can the manager make a decision between choosing alternative systems such as traditional maintenance systems, TPM and WMS? In the case of TPM or WMS, top management should be involved from the beginning to implement and follow up, as these decisions are complex and involve huge investment in the long term. Before starting implementation, top management should be convinced of the necessary justification, which requires analysis of various qualitative and quantitative factors apart from analyzing various tangible and intangible benefits. In such a situation, the conventional, financial justification techniques alone cannot be used