The Indonesian government's decisive reaction to combat COVID-19, especially in vaccine distribution, is challenged by the system's complexity and various vaccine types. Cold chain management is essential for ensuring vaccines quality during last-mile delivery. This study employs the Decision-Making Evaluation and Laboratory (DEMATEL) based Analytical Network Process (ANP) to assess risk priorities in last-mile vaccine delivery by identifying three-dimensional risks: material handling, facilities, infrastructure, and coordination. Results indicate that material handling carries the most significant weight among these risks. Therefore, policymakers are advised to focus on mitigating risks associated with facilities and infrastructure to safeguard material handling.@en

Many countries have implemented Extended producer responsibility (EPR) strategies in terms of packaging waste management. Albeit having the regulations on waste management stated that producers have to take responsibility in managing their product waste, Indonesia, as the second largest contributor of plastic waste to the open ocean, has yet to implement EPR strategies in their plastic packaging waste management policy. To further address this environmental issue, the government of Indonesia formulated National Waste Management Policy and Strategy in 2017, which aims to reduce 30% of waste generation and manage 70% of waste generated in 2025. This study provides a conceptual model of system dynamics, which integrates EPR strategy schemes into the current plastic waste management policy in Indonesia using a causal loop diagram. This valid conceptual model hopefully could support many policy modelers to construct valid system dynamics model to evaluate relevant waste management policies in the future.

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The tremendous development of technology affects rapid growth in the use of ICT devices and services. However, the number of devices usage directly increase the Waste of Electronic and Electrical Equipment (WEEE), causing various environmental and human health problems. Previous studies showed that Closed-Loop Supply Chain (CLSC) is one of the solutions to solve the WEEE problem. Nonetheless, this CLSC concept is quite challenging to understand because of its complex material structure, terminology, mechanism, various collection, and treatment strategies. This research has a specific purpose of helping higher education students understand the CLSC concept more effective by using a Serious Simulation Game (SSG). As a result of this research, the author proposes an attainable conceptual design of SSG to help students extend their learning experience to understand the CLSC concept for solving the WEEE problem.

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