The multi-decision support model is developed and demontrated to minimise the cost of transport and treatment of municipal solid waste under the effected of socio and environment. The tool is simple, easy to upgrade to fit with the local condition, easy and fast running (some minutes). The model is used to compare the operation of MSW system if there are some changes in impact factors. The results of model show: (1) the distribution of amount of MSW from sources to treatment plants, (2) the selected treatment technologies, its capacity and location, (3) cost analysis of transport, treatment of MSW and the income. In the current situation of HCMC (case study 2), the model proposed 2 treatment tecnologies in 20 years planning, called bath anaerobic digestion technology and bioreactor landfill, with the treatment amount of 70% and 30%, respectively. In case of the planned land for treatment zone is not reached as case study 2, incineration technology will be a good choice.
Increased changes of trading rules in a global economy, more frequent adverse weather events due to climate change, and other unexpected events add more uncertainty to the ever-present logistics challenges for companies to manage their supply chains. Thus, there is increased theoretical and practical interest to prevent disturbances of logistics operations, as well as to manage disturbances when they occur and avoid supply chain vulnerability. Decreased vulnerability of supply chains is desired as it leads to robust and resilient supply chains. The objective of this paper is to understand how contextual factors, i.e., product and business environment related factors affect relationship between redesign strategies and vulnerabilities in the supply chain. We consider typical redesign strategies, such as the adoption of assurance systems, the use of proactive control, use of redundancy, or enhancing flexibility in supply chains. Seen from the lens of contingency theory, the findings from our literature review suggest that contextual factors affect the link between redesign strategies and vulnerabilities in the supply chain, but further research is needed to examine how each of the contextual factors affect selection and implementation of each redesign strategies used to manage supply chain vulnerabilities.
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