Submitted on: 30 January 2016.
Revised on: 08 May 2016.
Accepted on: 03 July 2016.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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Submitted on: 02 October 2009.
Revised on: 23 January 2010.
Accepted on: 11 February 2010.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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