YaSM was designed to be well aligned with ITIL and users familiar with ITIL will instantly recognize that there is a lot of common ground between the two frameworks.

But YaSM is somewhat leaner and less complex - without being simplistic: Every ITIL process serves a purpose, so YaSM does not merely omit a number of ITIL processes, as a number of approaches for "light" or "lean" ITIL would advocate. Rather, YaSM is less complex because it departs in some areas from ITIL's rigorous service lifecycle structure, and introduces a simpler and more intuitive process structure which distinguishes between "service lifecycle processes" and "supporting service management processes".

If you want to read more about how YaSM compares with ITIL, please check out the YaSM Wiki with a detailed description of how every ITIL process is represented in the YaSM framework.