Superimposed on the general economic trend is a strong seasonal pattern of demand for the industry's products. Seasonal demand is different for each market type (EU, Nafta, Internet), but the same for all types of products (1, 2, 3) in particular market. For example, if seasonal demand in EU market is +5%, it means that demand for each type of product in EU market increases by +5%.
Official GMC manual notes that usually the peak of demand is in 4 quarter of the year, but in fact the peak of demand may hit in any quarter of scenario because of simulator developers choice. In other words, predicting behavior of market, and rough estimating of seasonal demand effect in advance is not possible until you play a few games in a particular scenario. To accurately evaluate the impact of factors you need to analyze hundreds of management reports and take into account effects of other factors besides seasonality of demand, then calculate average result.
For example, this is seasonality of demand for scenario 12C1:
- 1 period: EU +2.5%; Nafta +1.1%; Internet -4.1%.
- 2 period: EU +5.0%; Nafta +0.1%; Internet +3.8%.
- 3 Period: EU -2.7%; Nafta -9.9%; Internet -2.1%.
- 4 Period: EU +4.4%; Nafta +6.5%; Internet +5.2%.
- 5 period: EU -18.1%; Nafta -12.0%; Internet -11.0%.