Patents Assigned to The Standish Group International, Inc.
  • Patent number: 8321370
    Abstract: A system and method is provided for translating one or more logical expressions E is TRUE, or statements of the form IF E1 is TRUE THEN E2 is TRUE, to a set of linear constraints. Examples in accordance with the present invention contribute to systems and methods for solving optimization problems that include constraints in the form of arbitrarily complex logical relationships between binary variables. Examples are also applicable to solving general optimization problems that have arbitrarily complex relationships between sets of linear constraints. The systems and methods combine simplification and ordering of logical expressions, factorization, direct translations of expressions, substitution of auxiliary variables, and substitution of auxiliary variables for phrases that would otherwise lead to an unacceptable number of linear constraints.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: November 27, 2012
    Assignee: The Standish Group International, Inc.
    Inventors: Sidnie Feit, James Hugh Johnson
  • Publication number: 20090228252
    Abstract: A system and method is provided for translating one or more logical expressions E is TRUE, or statements of the form IF E1 is TRUE THEN E2 is TRUE, to a set of linear constraints. Examples in accordance with the present invention contribute to systems and methods for solving optimization problems that include constraints in the form of arbitrarily complex logical relationships between binary variables. Examples are also applicable to solving general optimization problems that have arbitrarily complex relationships between sets of linear constraints. The systems and methods combine simplification and ordering of logical expressions, factorization, direct translations of expressions, substitution of auxiliary variables, and substitution of auxiliary variables for phrases that would otherwise lead to an unacceptable number of linear constraints.
    Type: Application
    Filed: March 6, 2009
    Publication date: September 10, 2009
    Applicant: THE STANDISH GROUP INTERNATIONAL, INC.
    Inventor: Sidnie Feit