ils411 on 23 April 2008
| Viper1 said: Trending like that doesn't scale linearly and fails for this kind of computation. Using the basic method of sales difference divided by difference in sales rate gives you the most accurate method of computation without accounting for seasonality, price drops and software releases. |
it never does. using the basic method is the safest though not necessarily the most accurate method. if it were the most accurate, vgchartz would be using it and not bothering with complex computations to forecast its sales figures. the same also holds tro for npd and every other firms and companies specializing in data collection and predictions.
