A control performance benchmark subject to output variance/covariance upper bound and pole placement constraint

User-specified benchmark has been reported in the literature for control loop performance assessment. A structured closed-loop response which is subject to simultaneous output covariance upper bound and pole placement constraint is proposed in this paper and served as an improved user-specified benchmark against which the existing controller performance can be compared. An LMI-based approach is used to formulate this problem and a cone complementarity linearization (CCL) algorithm is applied to find a global solution. An associated model approximation problem is solved in the sense of H₂-norm in contrast to the use of H_infin-norm of the previous work to obtain an optimal solution. The results are evaluated in a dry process rotary cement kiln example.