1. The estimate at completion problem: a review of three studies;Christensen;Project Manage J,1993
2. Cost performance index stability;Christensen;Natl Contract Manage J,1993
3. A review of estimate at completion research;Christensen;J Cost Anal Manage,1995
4. EAC evaluation methods: do they still work?;Christensen;Acquis Rev Quart,2002
5. Is the CPI-based EAC a lower bound to the final cost of post A-12 contracts?;Christensen;J Cost Anal Manage,2002