There are 3 areas that are to be observed by one or more administrators:
So who is initially the administrator? Upon installation, Naggregator provides a single user account that has all administration related roles assigned: 'admin' (password 'admin'). Use said account to assign administrative roles to further user accounts if required.
All administrative functionality is available using the web frontend which can be accessed at http://host.example/nag-web-jsp/user/entry/welcome.
The amount of regular administrative duties depends on the role of the Naggregator instance. If you happen to setup an instance for a small, restricted group of users, the administrative duties will tend to null as every project will have a dedicated set of resources, the users are free to register and the accounting duties are non-existant as every resource is free.
If you, on the other hand, offer a publically available service for a all users, you might chose to allow user registration on administrative approval only and you might offer the system resources on a payment basis which requires you to regularly manage incoming payments and the offered products.
Independently from the actual usage scenario, the system operator should browse through the administrative guides linked below to get the picture of tasks that might arise.