The Australian Industry Group (AIG) Construction Index reflects the state of the national construction industry. This index is based on a monthly survey of Australian construction companies.
Four key measures are calculated based on the survey results, including new orders, activity, employment and supplies in the construction industry. Participants estimate relative changes, i.e. whether the value has increased, decreased or has not changed during the specified month. Each of the values used for the index calculation is given a certain weight.
The index value above 50 indicates the industry growth, and below 50 is an indication of slowdown.