This article focuses on the assessment procedures of Norwegian PhD theses as viewed by external members of evaluation committees from three countries with different examination systems; the USA, the UK and Sweden. Their viewpoints give useful information not only on the pros and cons with the Norwegian system, but also on the strengths and weaknesses of their own national assessment systems. Various procedures of the four national PhD assessment systems are compared: the composition of the evaluation committee, the status of the thesis as published work, the pre-examination assessment, and the examination and defence.