I know that their roles were defined in-universe but I remember it didn't make much sense to me.
I was thinking about parallels in IT and characters in the movies. For example, the Agents were more or less a type of network intrusion prevention/detection system, Seriph was an authentication and encryption protocol, and the Keymaker was a password crack program.
Another parallel is that the reason why the Machines needed Neo to return to the Source was so they could analyze the manifestation of his existence, patch the Matrix, and attempt to prevent him from happening again. (It's my understanding that Neo is an artifact of something wrong with the operational programming that is running, hence why he can easily work outside of control protocols that others adhere to. It also explains how Smith could leave his role and "break free"--he obtained the code from Neo that keeps him from working correctly and communicating with the Machine network.)
It got me wondering what exactly the Oracle and the Architect did. A possible explanation is that the Architect operates the proportional leg of a PID control. He always talks about balance and concerns himself with making an opposite response to a given input. The Oracle has the ability to predict and appears to perform the derivative function of the PID control. It's been mentioned that the two work in tandem so that plays right into the idea. I'm not sure who the integral part would be. The Merovingian maybe?
I wonder if anyone has mentioned this or if anyone agrees. I think it's a neat concept and I think it holds water. What do you all think?