What are Merits and demerits of barometric method of demand forecasting?

Demerits of barometric method :

1. In this method , the direction of change is the basis of prediction, the actual size of change cannot be measured.

2. The situations may become complicated by the fact that there may be variations in the length of the lead time between various indicators which means that the accuracy of predictions may be reduced .

3. Finding an appropriate indicator may be difficult .

Merits of barometric method :

1. It is an improvement over trend projection method .