Pemilihan metode peramalan untuk mendapatkan peramalan obat yang akurat dengan metode Single Exponential Smoothing (SES), Autoreggresive Integrated Moving Average (ARIMA), dan Artificial Neural Network (ANN) pada divisi farmasi di rumah sakit. = Selection of forecasting method that suitable for medicine forecasting in Hospital Supply Chain using Single Exponential Smoothing (SES), Autoregressive Integrated Moving Average (ARIMA), and Artificial Neural Network (ANN) in hospital pharmaceutical divi