Submitted on: 26 September 1999.
Revised on: 13 November 1999.
Accepted on: 04 December 1999.
___________________INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS
http://reply.papertrans.cn/2/140/13988/13988-32.png
http://reply.papertrans.cn/2/140/13988/13988-33.png
Submitted on: 05 October 2020.
Revised on: 04 January 2021.
Accepted on: 05 February 2021.
___________________INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS
Submitted on: 03 July 2023.
Revised on: 16 September 2023.
Accepted on: 16 October 2023.
___________________INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS
http://reply.papertrans.cn/2/140/13988/13988-36.png