1. The specifications of resources supply and demand forecasting models and setting of variables are based on macroeconomic theory, the structural characteristics of Taiwan's economy, and domestic and foreign economic trends. The results of the estimation are released after discussion and examination of the National Income Statistics Evaluation Committee composed of outside experts, specialists, and the representatives of relevant agencies.
2. As a small open economy, Taiwan is significantly influenced by domestic and foreign uncertainties. Obviously any model forecasts inevitably have errors. Especially growing numbers of unpredictable global events or disasters are exerting explosive negative effects, it is extremely difficult to keep the accuracy of forecasts. For instance, the high-tech bubble burst in 2001, the United States' 911 terrorist attacks, and the 2008 and 2009 financial crisis and recession dealt sudden blows to the world economy, and those incidents boomed the forecasting error significantly.
3. DGBAS' economic forecasts are revised on a quarterly basis in accordance with the newest trends, market movements and policy changes. Comparing the forecast at the August of the previous year to actual economic growth rates, the average error of DGBAS’s forecast during 2002 to 2008 was 1.6 percentage points.
4. DGBAS, bears responsibility for governmental budget and statistical matters, revises its forecasting models based on domestic and foreign information and experience, and DGBAS' forecasting methods and their accuracy have received wide credits from the users of the general public.