Karl’s Copiers sells and repairs photocopy machines. The manager needs weekly forecasts of service calls so that he can schedule service personnel. Use the actual demand in the first period for the forecast for the first week so error measurement begins in the second week. The manager uses exponential smoothing with a = 0.20. Forecast the number of calls for week 6, which is next week.
Week Actual Service Calls
1 ........ 24
2 ........ 32
3 ........ 36
4 ........ 23
5 ........ 25