The pdf below contains the LiteRM software quality model. Open the left sidebar to 2 3/4 " (i.e., the middle of "settings")  and use the  outline to navigate the model.

LiteRM quality model .pdf LiteRM quality model .pdf
Size : 933.244 Kb
Type : pdf

Below is the Quality Goals chapter of Understanding Requirements: Beyond the basics.   It describes the 3D quality model available above and suggests how to use it.   Most suggested readings in this chapter are freely downloadable from the book's website.

Chapter 3 Quality Goals.pdf Chapter 3 Quality Goals.pdf
Size : 2354.804 Kb
Type : pdf