What term describes a tangible and stable result of a performance or task?

The term that most accurately describes a tangible and stable result of a performance or task is "Deliverable." A deliverable is a specific output produced as a result of a project or work activity. It represents a completed work product that can be evaluated, delivered, and demonstrates the fulfillment of project objectives or requirements.

While "Product," "Outcome," and "Result" might seem related, they each have nuances that differentiate them from being the best fit for this definition. A product typically refers to an item or service that is produced and sold in the market, which may not always be directly linked to a performance task. The term outcome is often used to refer to the overall impact or effect of a performance, particularly in educational or healthcare settings, rather than a specific, tangible item. Similarly, result is a broader term that can encompass various types of outputs, but it doesn’t specifically point to a tangible item created at the end of a process like deliverable does. Thus, deliverable is the most precise choice in this context.