Oromia Forest Industry’s Supply Chain Network Performance Analysis
Hiluf Reda,
Birhanu Beshah
Issue:
Volume 6, Issue 6, December 2018
Pages:
142-149
Received:
5 July 2018
Accepted:
27 July 2018
Published:
10 January 2019
DOI:
10.11648/j.ijmea.20180606.11
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Abstract: Supply chain network performance measurement is the process of qualifying the efficiency and effectiveness of the supply chain. Supply chain network performance analysis is one of the promising tools employed for assessing performance and then taking the necessary measures for improvements of existing supply chain network. Ethiopia’s forest coverage is estimated about 10 to 30 percent. Still there are efforts to increase the coverage. Reducing deforestation has equal importance with that of increasing plantation to improve forest coverage in the country. For instance, in order to reduce deforestation the government has put in place a policy to import wood and wood products without tax. However, if the forests are not properly cultivated or harvested then forests will decay and also triggers illegal users which intern will have impact on the forests coverage in the country. In this study, Oromia Regional State which covers 70% of the total forest coverage in the country is considered and the research identified that forests are decaying in the region. This is partly because the major customers are far from the forests. Hence, the forest products supply chain network is first analyzed. For this purpose, main sources of data were interview, observations, secondary data, Geographic Information System (GIS), and standard preference table. Based on the findings a new supply chine network is designed which enables the Oromia Forests Industry optimally utilizes its resources and at the same time address customers’ requirements keeping the current forest as well as improving forest coverage of the region.
Abstract: Supply chain network performance measurement is the process of qualifying the efficiency and effectiveness of the supply chain. Supply chain network performance analysis is one of the promising tools employed for assessing performance and then taking the necessary measures for improvements of existing supply chain network. Ethiopia’s forest coverag...
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Solidification and Filling Related Defects Analysis Using Casting Simulation Technique with Experimental Validation
Nazma Sultana,
Md. Rafiquzzaman,
Younosur Rahman,
Apurba Das
Issue:
Volume 6, Issue 6, December 2018
Pages:
150-160
Received:
13 September 2018
Accepted:
2 November 2018
Published:
28 January 2019
DOI:
10.11648/j.ijmea.20180606.12
Downloads:
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Abstract: Solidification as well as filling has great influences on the quality of cast products. In modern competitive world for increasing the quality of products these two steps draw higher attention to casting engineers. This case study is just one of the followings of the above mentioned objective. The aim of the present work is to reduce the rejection rate of cast products in a foundry shop due to casting defects in sand casting process using a computer aided simulation technique. In general conventional techniques require a larger number of trials with higher costs for checking outputs when the number of process parameters increase that can be reduced using simulation. For the simplification in this analysis grain size of sand, material quality, casting process parameters are considered uniform for all cases. Only the positional and dimensional variances are taken in considerations for defects analysis. It is found that defects such as shrinkage porosity, improper solidification, air entrapment, mould erosion are directly related with gating and feeding system design and although other process parameters are considered uniform but this defects will be changed with changing the design parameters. In this case Click2cast casting simulation software is used for mould filling and solidification analysis and it is observed that proposed gating and feeding system design improves casting yield approximately 15% more than conventional gating and feeding system. The validation of simulation is proved through experimental trials in foundry shop.
Abstract: Solidification as well as filling has great influences on the quality of cast products. In modern competitive world for increasing the quality of products these two steps draw higher attention to casting engineers. This case study is just one of the followings of the above mentioned objective. The aim of the present work is to reduce the rejection ...
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