What term refers to a technology's ability to successfully deliver a given solution?

The term that best refers to a technology's ability to successfully deliver a given solution is capability. In the context of technology and systems, capability denotes the specific functions, features, and overall effectiveness of a system in fulfilling particular requirements or tasks. It emphasizes how well a solution can perform its intended purpose and meet user needs.

Considering other terms, scalability refers to the system's ability to handle increased loads or expand its capacity without sacrificing performance. Reliability refers to the system's ability to function consistently over time without failure. Flexibility signifies how adaptable a system is to changes in requirements or environments. While each of these terms highlights important aspects of technology, capability specifically focuses on the overall effectiveness in delivering solutions, making it the correct choice in this context.