An example of a strong diversity hiring metric would be if a company were to set a goal of hiring a certain percentage of employees from underrepresented groups. This could be done by looking at the demographics of the company's workforce and then setting a goal to hire a certain percentage of employees from groups that are underrepresented. The company could then track their progress towards this goal and report on it regularly. This would be a strong diversity hiring metric because it would be specific, measurable, achievable, relevant, and time-bound.