Fundamental research that underpinned the Level(s) framework was conducted between 2015 and 2017. The set of indicators produced from this research were tested during 2018 and 2019 in 130 different building projects. After restructuring the indicator framework and making corrections based on tester feedback, Level(s) was launched in October 2020.
The JRC continues to be involved in responding to some technical queries, in communicating to the public about Level(s) in seminars, workshops and conferences, and in making minor updates to Level(s) tools and documentation.