Submitted on: 13 February 2006.
Revised on: 17 May 2006.
Accepted on: 15 June 2006.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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Submitted on: 26 November 2006.
Revised on: 21 January 2007.
Accepted on: 08 February 2007.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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Submitted on: 27 January 2010.
Revised on: 21 May 2010.
Accepted on: 03 June 2010.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT