@article {1970946, title = {On Design, Verification, and Dynamic Modification of the Problem-Based Scientific Workflow Model}, journal = {Simulation Modeling Practice and Theory}, volume = {15}, year = {2007}, month = {2007}, keywords = {BIS, Business Analytics}, author = {Liu,X. and Wanchun,D. and Chen,J. and Fan,Shaokun and Cheung,S. C. and Cai,S.} }