Analisa efisiensi proses discharge dengan pendekatan lean six sigma pada pasien penyakit dalam, neurologi, bedah jantung, dan paru di Instalasi Rawat Inap Teratai RSUP Fatmawati tahun 2015 = Analysis of discharge process efficiency with lean six sigma approach in patients with internal medicine, neurology, surgery heart, and lung in Inpatient Lotus RSUP Fatmawati in 2015