Further Study for Maximizing Deviation Method with Trapezoidal Fuzzy Number.

This study is a response to a paper on group decision problems in a linguistic environment. We show that their M1 model can be directly solved by Schwarz inequality to avoid using the Lagrange multiplier methods. Moreover, their M2 model can also be solved by our modification of applying Schwarz inequality to avoid referring to soft ware of MatLab with Lingo or Lindo soft ware package or optimization toolbox. The same numerical examples are provided to illustrate our findings. [ABSTRACT FROM AUTHOR]