The possible quality measures are declared in Cplex.QualityType. A quality object is returned by the method Cplex.GetQuality. The returned quality object contains its type and the numeric value of the requested quality measure. For many quality measures, the value is attained at a specific constraint or variable. In such cases, the relevant constraint or variable is contained in the quality object as well, unless the constraint has been implicitly created as a result of automatic linearization. Methods are provided to query all information stored in a quality object.

For special considerations about the information available from the solution of a mixed integer programming (MIP) model, see the topic User's Manual: Discrete optimization: Solving mixed integer programming problems (MIP): Using the MIP solution: Accessing information about the MIP solution. See also the topic User's Manual: Discrete optimization: Solving mixed integer programming problems (MIP): Troubleshooting MIP performance problems: MIP kappa: detecting and coping with ill-conditioned MIP models.

For special considerations about the information available from the solution of a model solved by the barrier optimizer, see the topic User's Manual: Continuous optimization: Solving LPs: barrier optimizer: Understanding solution quality from the barrier LP optimizer .