In addition to the regular construction cost indexes, IGG also maintains a tendering index per type. The procurement index has been kept by IGG since 2007 and is a reflection of the tightness or space in the procurement market. The tender index gives the average
tender result again compared to a management estimate based on the price development equal to the construction cost index.
The tendering index is an average deviation from the construction cost index at the time the work is put on the market. The method of tendering may result in deviations from the given tendering index.