You may create resources in Project Server at the enterprise or local plan level. Local resources exist within an individual plan and aren’t part of the enterprise resource pool. I discourage you from using local resources, as Project Server always attempts to create a user account for local resources. This typically results in system errors unless you’ve altered the default settings on account creation under Manage organization Features, as discussed in the previous chapter.
You have tighter control over the system when all your resources are managed through the enterprise resource pool. If you’ve given sufficient consideration to generic resources, a project manager is never without adequate fodder for temporary resource representation. Because you can’t stop project managers from entering local resources into their plans, without implementing custom code, this becomes a training and policy issue. Determine a definite workflow for your organization’s handling of resource creation.