From comparison, In Division of Building Management opinion that quotation of Mr.Cleaning Company did not clearly specified in detail of work despite we request for clearly specified about the detail such as silicone for using the process. So, when compared with the same thing in details of work and materials in used already. The costs of NUALVIWAT Company lower than C.M.I Company as the amount of 731,580.40 bath. Therefore, we would recommend NUALVIWAT Company