Six groups drive the index, covering activity, demand, work, outlook, purchases and subcontractors.
- Total Activity: change in total building volume versus the prior month, the headline index.
- Housing, Commercial and Civil Engineering Activity: housing, commercial buildings and infrastructure such as roads and utilities.
- New Orders and Employment: new business volumes and staffing levels versus the prior month.
- Future Activity: expected activity over the next 12 months, not a monthly change.
- Quantity of Purchases, Suppliers' Delivery Times and Input Prices: buying, delivery speed and costs, with above 50 faster and below 50 slower for deliveries.
- Subcontractor Usage, Availability, Quality and Rates: use, availability, quality and rates, with above 50 growth, improvement or inflation.
In the 6 May 2021 release for April 2021, Total Activity was 50.1, flat on March for a second month. Input prices hit 84.9 and subcontractor rates 62.5, both records since January 2000, while delivery times fell to 23.6, weakest since April 2020. New orders were 50.0, with Germany at 46.2, France at 49.8 and Italy at 57.6, while housing was 52.1, commercial 47.3 and civil 48.1. A reading near 50 can hide sharp splits, so the parts tell more than the flat headline.