1. A method for simulating a security apparatus within a service oriented architecture (SOA), comprising: gathering performance data for the SOA; generating, based on the performance data, a first queuing performance model to model resource usage by at least one user of the SOA; generating, based on the performance data, a second queuing performance model to model a kernel of the SOA; generating, based on the performance data, a third queuing performance model for a Central Processing Unit (CPU) of the SOA; and generating a Queuing Network model by interconnecting the first queuing performance model, the second queuing performance model, and the third queuing performance model, wherein the Queuing Network model simulates the security apparatus within the SOA.