What Practice Area provides business value by enhancing decision-making and selecting the optimal solution?

The Practice Area that provides business value by enhancing decision-making and selecting the optimal solution is indeed Decision analysis and resolution. This practice area is focused on the processes and techniques employed to evaluate and make informed decisions regarding various alternatives available to an organization. It emphasizes the importance of using structured approaches to analyze situations, weigh options, and choose the path that aligns best with the organization's goals and objectives.

In the context of improved decision-making, this practice area helps organizations to efficiently analyze data, consider potential impacts, and balance various factors such as costs, risks, and benefits. By following this systematic approach, organizations can minimize biases, enhance the quality of their decisions, and ultimately drive better outcomes, leading to greater business value.

The other practice areas, while valuable in their own domains, serve different purposes. For instance, Supplier agreement management focuses on establishing and maintaining relationships with suppliers, Causal analysis and resolution deals with identifying and addressing the root causes of issues, and Risk management involves identifying, analyzing, and mitigating risks associated with processes or projects. Each of these areas contributes to an organization's success but does not primarily target enhancing decision-making through the selection of optimal solutions in the same way that Decision analysis and resolution does.