Steering Metrics. Legacy Organizations are obsessed with measurement, often using it as a form of control—to find and punish weak performance. But when we obsess over metrics, we fall victim to Goodhart’s law, which states that a measure that becomes a target ceases to be a good measure.6 Why? Because human beings will manipulate the situation in order to move the numbers. Instead, we should think of metrics as guides for steering toward our purpose.