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...Es web of conferences https doi org esconf icenis improving quality pvc pipes using taguchi method farida ariani khawarita siregar khalida syahputri and indah rizkya department mechanical engineering faculty university sumatera utara medan indonesia industrial abstract pt xyz is a company in the field manufacture pipe poly vinyl chloride products produced often have disability are not standards compliant exceeds tolerance which has been set by competitive competition product marketing lead companies needs to boost importance one reasons research this study seven tools analyze used identify factors that influence defects produces optimum combination level significance coolant temperature c at extruder haul off speed m s pressure mpa printing keywords methods introduction data on production september average percentage defective era globalization must be able reached rate optimize their resources wherewith enactment under asean free trade area afta with resulted china acfta having recycl...