Submitted on: 24 December 2013.
Revised on: 30 January 2014.
Accepted on: 17 February 2014.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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Submitted on: 18 June 2004.
Revised on: 18 September 2004.
Accepted on: 13 October 2004.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT
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Submitted on: 18 September 2003.
Revised on: 08 November 2003.
Accepted on: 12 December 2003.
___________________JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT