As a Windchill ESI administrator, you may have to involve and coordinate a wide variety of specialists to fully resolve production issues. These parties may include end-users, functional experts, Windchill PDMLink administrators, Oracle Applications administrators, database specialists, operating system specialists, network administrators, and others. If, after diagnosing and localizing an issue, you determine that the problem cannot be solved in-house, you may need to escalate it to systems integration partners or to PTC Technical Support, or both, for assistance. Systems integration partners may be particularly critical to help you resolve problems involving special configuration or customizations made to the standard Windchill ESI product.