Since 2010, the Polish Agency for Enterprise Development in cooperation with the Jagiellonian University has been running one of the largest European research projects in the area of competences, employment and the labour market. The main objective of the Study of Human Capital (BKL Study) project is to diagnose and monitor human capital resources existing on the Polish labour market and factors responsible for their development. This objective will be achieved through the implementation of surveys conducted among employers, general population and training institutions. The report describes in detail the methodological assumptions of the BKL Study in the years 2016-2023. After conducting field research in each subsequent year, the core of the report will be supplemented with a part summarizing the implementation.