I have a shapefile of polygons data. In the attribute table, I have a field named as "rank".
I want to assign the values in rank field through ModelBuilder.
Are there any solutions for this?
Calculate field should be what you're after. http://resources.arcgis.com/en/help/main/10.2/index.html#//00170000004m000000
Just select the feature(s)/row(s) that you want to "edit" first.