In a thesis? It should be sufficient for someone to easily replicate your work and the rest is probably up to you, your supervisor, your university and your discipline.
Basically, what I'm saying is it is difficult to give an answer because it varies so much. You are better off checking with your supervisor and looking at theses in your dept.
As TreeofLife says every methods section is different. You need to describe all your techniques (or reference texts standard techniques) including your data analysis. Basically write down everything you did, then try to make it sounds scientific =)