A Comparison of Univariate Time Series Methods for Forecasting Intraday Arrivals at a Call Center James W. Taylor Saïd Business School University of Oxford Management Science, 2008, Vol. 54, pp. 253-265. Address for Correspondence: James W. Taylor Saïd Business School University of Oxford Park End Street Oxford OX1 1HP, UK Tel: +44 (0)1865 288927 Fax: +44 (0)1865 288805 Email: james.taylor@sbs.ox.ac.uk