Synnefo

When a user is creating a project he can set values for each resource.

Setting all available values is not mandatory.

This means that the resources NOT set can be infinite.

Although this is a policy issue, handing out infinite resources can cause problems.
Especially if this is not monitored giving the option to an administrator to react promptly.

A conservative approach would be to make each field mandatory and also set a hard top limit.

In any case, a soft limit is necessary which would trigger a notification event (e.g. an email to the admins).