Business Activity Index (BAI) is one of indicators, which reflects current state in various sectors or economy as a whole.

Business Activity Index is used in various countries and it is figure on business optimization of the business participants.

The index cane serve as practical tool on planning process and development of the strategy of the company.

BAI do not reflect concrete prices, volumes, income and other parameters, and it is based on professional intuition and personal assessments of responders on current situation and upcoming trends in economy.

BAI could be useful to forecast of economic crisis and start of the economic growth.