...T.S. Lee; Steven J. Feller; Everett E. Adam, Jr Applies time‐series forecasting, a traditional operations analysis methodology, to develop a forecasting procedure and ordering policy for a natural‐gas customer of Columbia Gas of Ohio, USA. Evaluates six time‐series methods and four operating...

... Absolute Deviation (MAD) and the Mean Square Error (MSE) are used as the criteria for evaluating forecasting accuracy, the moving average technique is superior to the moving median technique only for time series simulated from the standard normal distribution. The moving median technique is superior...

... using short‐term forecasting methods, and weekly and four‐weekly data. The approach can, however, be applied equally to immediate, medium‐ and long‐term forecasting. © MCB UP Limited 1990 Management Forecasting Time series Models Reliability IJOPM 10,3 50 Received March 1989 Revised...