MA.5:5.1 - Obtain the missing demand input

At the information cutoff, a service has sixty booked units due next month. Under the supplied teaching premises they will remain due and be delivered. Three comparable earlier months received another 35, 40 and 45 units after the same cutoff, all delivered in the respective forecast month. These counts exclude each month’s already booked work.

Assume unchanged demand conditions and no relevant trend or seasonality for this example. The average residual of (35 + 40 + 45) / 3 = 40 is a simple benchmark, so sixty booked plus forty further units gives 100. Adding the sixty to a forecast of total deliveries would have been a different, overlapping calculation. These three observations illustrate the construction; they do not establish a best model or a calibrated distribution.

The account also considers two separate conditions. A channel interruption would remove twenty of the forty residual units, while a proposed campaign could bring twenty additional units beyond the benchmark. Neither changes the sixty booked units under the supplied premises. The interruption branch gives 80; the campaign branch gives 120. The campaign effect is additional to the normal residual population. These are alternative planning scenarios, not probabilities or effects to add simultaneously. In practice, obtain the channel and campaign evidence that makes their effects plausible. If the stable-demand premise fails and no replacement estimate is supported, retain conditional scenarios or obtain a better forecast.

A reader who already has adequate 80/100/120 scenarios can enter the following conversion directly.