Final answer:
In engineering, a metric is a measurable value related to customer needs and product performance, not just a unit of measurement. Metrics are used to guide design decisions and ensure the product satisfies customer criteria.
Step-by-step explanation:
In the context of engineering requirements, a metric is B. a measurable value or attribute of the product related to one or more customer needs. Metrics are essential for determining how well a product meets the criteria set by the needs and wants of customers or stakeholders. Unlike a simple unit of measure, metrics are tied directly to customer satisfaction and the product’s performance in fulfilling specific needs.
A criterion, in contrast, is a standard or attribute that can be used to compare different designs to solve a problem. For example, weight and size are criteria that one might use to evaluate and compare different solutions. The metric system of measurement includes units like meters, liters, and grams, which can also serve as criteria if specific measurements are required in the engineering design. However, these metric system units are not what is meant by 'metric' in the context of engineering requirements.
It's important to understand that in engineering, when we discuss 'metrics', we’re often talking about performance indicators that can be quantified and measured, such as efficiency, durability, or speed, rather than just units of measurement. These metrics guide the design process and help in making decisions about which design or product iteration best meets the intended goals and specifications.