Extending the IMC tuning method for single variable processes, one parameter tuning method for multivariable processes where closed loops follow desired responses is proposed. With the proposed method designer''s effort can be minimized since multiloop control systems are tuned with only one design parameter of the closed loop time constant. Problems of simple decentralized controller design methods such as the very slow response by excessive detuning in the BLT method and the unsymmetrical response of the sequential loop closing method can be partially solved.