The Programme for International Assessment of Adult Competencies (PIAAC) will establish technical standards and guidelines to ensure that the survey design and implementation processes of PIAAC yield high-quality and internationally comparable data. This document provides a revised version of the technical standards and guidelines originally distributed (October 11, 2008). The document is structured in two parts: (1) Part I provides an introduction to PIAAC and its objectives as well as the methodologies; and (2) Part II presents the proposed standards, together with their rationale, technical implications, recommendations for implementation, and quality assurance procedures. The standards presented in this document are the generally agreed upon policies or best practices to be adhered to in the conduct of the survey. The guidelines are statements which elaborate on the implementation of the standard(s). Once the guidelines and standards are adopted, it is essential that all countries follow them. Where this is not possible, countries may apply for derogations from the standards. Where such derogations would compromise the survey objectives, the PIAAC Consortium will bring these to the attention of the OECD Secretariat, which, in turn, may refer them to the BPC for arbitration in situations where they might compromise the collective value of PIAAC. In addition to the standards and guidelines, the document provides recommendations which are designed to further improve the quality of the survey implementation and results. The recommendations are suggestions based on experience and best practices which would be acceptable approaches or activities to be undertaken in conjunction with a standard(s). Individual sections contain references. Annexes are included.