The robust stabilization problem for a family of linear an certain interval plants is addressed, and a solution is presented based on switching control. The main feature of this note is that the entire switching procedure is made using only information of the output variable. It has been shown that the proposed algorithm allows the shortening of the phase of "scanning" among the different configurations with respect to existing algorithms, thus reducing the transient phase during which the system output may diverge because of destabilizing controllers applied.