Governments and other stakeholders have become increasingly interested in assessing the skills of their adult populations for the purposes of monitoring how well prepared they are for the challenges of the new information world. The current paper provides an overview of the conceptual framework developed for the assessment of problem solving in technology-rich environments for the OECD's Programme for the International Assessment of Adult Competencies (PIAAC). This covers the specific class of problems that people encounter when using information and communication technologies. These include problems where the existence of the problem is a consequence of the availability of new technologies, where the solution requires the use of computer-based applications or where the problem relates to the management or use of information technologies. (Contains 1 figure and 5 tables.)