From comparison, GOODLIFT SERVICE Part., Ltd can fix the systems and have a price lower than OTIS Company that changes new equipment as the amount of 224,700 bath. In part of warranty, GOODLIFT SERVICE Part., Ltd have a 6 mouths and OTIS Company have a 1 year. Therefore, Division of Building Management have opinion that in order to save the cost we would like to recommend GOODLIFT SERVICE Part., Ltd.