“…This is an important activity in requirements analysis [2] particularly in nonfunctional requirements analysis [3]. The related work about performance requirements can be found in [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]. In [4] technology based on petri nets, formal logic, and simulation can be used to describe and analyze some important aspects of data processing performance requirements.…”