To begin, you will need to understand what is meant by WordPress Theme Framework. Technically (according to the WordPress Codex) any stand-alone Theme can act as a Framework. This is in the sense that any stand-alone Theme that allows you to make alterations to it, can be used as a framework.
What is a WordPress Framework?
There is a bit of confusion when it comes to the term WordPress Theme Framework. While the concept is that a Theme Framework is a bare bones, well-designed WordPress Theme for a developer or designer to build many client sites upon, some people think that a WordPress Theme Framework is an ultra-basic theme that has next to no formatting. When someone refers to WordPress Framework they may also be referring to the archive of code used to create Parent Themes.