Key points are not available for this paper at this time.
Chris Chatfield, Mohammad Yar, Holt-Winters Forecasting: Some Practical Issues, Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 37, No. 2, Special Issue: Statistical Forecasting and Decision-Making (1988), pp. 129-140
Chatfield et al. (Fri,) studied this question.