I am working on call center load forecasting. I have daily call volume for past 24 months along with few variables which does affect call load. Though none of these variables have come significant in ARIMA model.
My management has asked me to create forecast for two months in advance. I am concerned that just by using call center daily call volumes in Arima model my prediction will not be accurate so far in future.
Autocorrelation of daily call volume deteriorates drops to less than 0.5 in 5 days. I don't think that it will be very accurate for predicting values 2 months from now. What are your thoughts on this.