Which type of system is completely finished, tested, and ready for implementation?

• A. Turnkey system
• B. Backbone system
• C. Vendor-supported system
• D. Custom system

Answer: (A)

The main idea here is a system that is fully developed, integrated, tested, and ready to go into operation without requiring significant additional work by the customer. A turnkey solution is delivered as a complete package that has already been designed, built, and validated end-to-end, so the organization can implement it immediately after delivery.

This type of system typically includes installation, configuration, data migration, user training, documentation, and ongoing support provided by the vendor. Because everything is preassembled and tested, the deployment risk is lower and the start-up time is faster than with systems that require substantial customization or assembly after delivery.

Why the other ideas don’t fit as neatly: a backbone system isn’t a standard description for a fully finished, ready-to-implement product in this context, since it usually refers to a core infrastructure concept rather than a complete, packaged solution. A vendor-supported system implies ongoing support, but it doesn’t necessarily mean the system is already fully complete and ready for immediate deployment. A custom system is built to meet specific needs and typically involves more development, integration, and testing before it is ready for use, so it isn’t inherently “complete and ready” at hand.