Metrics are quantitative measures used to evaluate performance. Key performance indicators (KPIs) are critical metrics chosen to measure progress towards organizational goals. KPIs can differ between companies and should be specific, measurable, achievable, relevant and time-bound. Implementing KPIs can be challenging as they require integrating metrics into a company's culture and processes, and managers may not understand limitations. A balanced scorecard approach uses metrics from financial, customer, internal business, and learning/growth perspectives for a more well-rounded evaluation.