Hi, I do not usually come to this website for discussion. So, if you would like to reply, please send message to jesse.she@gmail .com. I found your post, very incidentally, from Google. We have very similar topics. So I am thinking if we can discuss a little bit regarding the web-service related simulations. I am doing the research work regarding security-aware service composition. And, I also need to do the simulation, and thus, need to make a lot of assumptions regarding the QoS parameters of each service that is to be composed. This include the service latency. However, this is very difficult to get a reasonable assumption about this, so I am wondering how you do this.