Business tendency surveys (manufacturing) > Confidence indicators > Composite indicators > OECD IndicatorThe standardised Business Confidence Indicators (BCI) are confidence indicators comparable across countries. Comparability has been achieved by careful selection of national indicators, and by smoothing, centring, and amplitude adjusting these series. For the majority of the countries the standardised BCI is calculated from harmonised industrial confidence indicators (based on a common
methodology). The OECD has decided to fix 100 as mean of the OECD Standardised BCI. Therefore 100 represents the long term average, or normal situation, and is not attached to a specific base year.