Question

& If historical time series data is very limited, what type of forecasting approach would be useful?& & & & & & & & & & & & & & &
& & & & & & & & & & & & & & & & & &
& & & a. Moving average& & & & & & & & & & & & & & &
& & & b. Delphi method& & & & & & & & & & & & & & &
& & & c. Double exponential smoothing& & & & & & & & & & & & & & &
& & & d. Regression model with seasonality

Answer 1

If you need to make a forecast and the historical time series data is very limited it's hard to apply quantitative methods (as a,c,d).The qualitative methods should be used. Among them are expert assessment methods, the Delphy method is one of expert assessment methods. So the answer is b.Delphi method