Constraints management dengan product mix algorithm dan drum buffer rope berdasarkan prinsip five focusing steps dalam rangka memaksimalkan throughput perusahaan (studi kasus: PT Metal Diameter) = Constraints management with product mix algorithm and drum buffer rope based on five focusing steps principle in order to maximize company throughput (case study: PT Metal Diameter) (Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015)