Different universities have different standards. In Australia, there are no numbers for publications. Further, engagement in international association or affairs is an important index. National project completion is another.
You can use Scopus and WoS to do a statistical analysis. Then you can get a basic assessment.
Patrick - it's not usually about how many - but other quality indicators - such as national/international reputation and impact. For instance, citation scores/h-index are more important than the amount of publications. It's also not just about publication - but research income, university/community service and excellence in teaching and learning.
I am in the United States & agree with many of the above answers.... each University has different qualifications for tenure or other professional appointments..... So important to understand both your country standards & the particular institution..... But totally agree usually not about the actual number but the quality of the papers, which publications that your research has been published in.... Academic committees, community involvement etc.. So a number of factors go into any professional appointment... Good Luck!