An administration process implements an established function, policy or directive in a repeatable and measurable way. The following are the basic steps an administration process with the frequently repeated steps in bold.
Plan → Design → Execute → Measure → Optimize → Lessons Learned
As part of your administration you will likely follow other processes in parallel such as a risk management process, communication process, change management process and performance management process.
Capture the requirements for the administrative function and create a plan to achieve them.
Implement the designed administrative functions.
Make changes to execution to try to improve results. This is a cycle of execute → measure → optimize ↺.
Lessons learned is the process of taking a step back from optimization to look at the big picture. Evaluate your results and think about how things could be different.