I just reviewed a tag wiki written for the analysis tag and it seemed like it would have been more suited to a tag named spatial-analysis. Nevertheless, in the absence of a better classification/definition, I approved it.
A quick review of a few of the 128 or so Questions tagged analysis suggests to me that this tag is often being used in in the same way I would use the geoprocessing tag e.g. What is the FME Equivalent to the ArcGIS Union tool?.
Should analysis and the not yet used spatial-analysis tags simply be made synonyms of geoprocessing as a "quick fix", or should the analysis tag be disambiguated in a way that will take considerably more effort along the lines of what was done here for adf?
Personally, I am hoping for a A real solution to ambiguous tags to be implemented.