This book constitutes the revised selected papers fromthe 12th International Conference on
Formal Aspects of Component Software FACS2015 held in Niterói Brazil in October 2015. The
15 full papers and 2 invited papers presented in thisvolume were carefully reviewed and
selected from 33 submissions. They areorganized in topical sections namely quality of service
to withstand faults component-based software development through research on mathematical
modelsfor components composition and adaptation rigorous approaches toverification
deployment testing and certification.
