Against metrics: how measuring performance by numbers backfires

Getting your Trinity Audio player ready...

Jerry Z Muller is professor of history at the Catholic University of America in Washington, D C. His most recent book is The Tyranny of Metrics (2018).

More and more companies, government agencies, institutions and organisations are today in the grip of a new phenomenon. I’ve termed it ‘metric fixation’. The key components of metric fixation are the belief that it is possible – and desirable – to replace professional judgment (acquired through personal experience and talent) with numerical indicators of comparative performance based upon standardised data (metrics).

The rewards can be monetary, in the form of pay for performance, say, or reputational, in the form of college rankings, hospital ratings, surgical report cards and so on. But the most dramatic negative effect of metric fixation is its propensity to incentivise gaming: that is, encouraging professionals to maximise the metrics in ways that are at odds with the larger purpose of the organisation.

Contrary to commonsense belief, attempts to measure productivity through performance metrics discourage initiative, innovation and risk-taking. The source of the trouble is that when people are judged by performance metrics they are incentivised to do what the metrics measure, and what the metrics measure will be some established goal. But that impedes innovation, which means doing something not yet established, indeed that hasn’t even been tried out.

Innovation involves experimentation. And experimentation includes the possibility, perhaps probability, of failure. At the same time, rewarding individuals for measured performance diminishes a sense of common purpose, as well as the social relationships that motivate co-operation and effectiveness. Instead, such rewards promote competition.

Organisations in thrall to metrics end up motivating those members of staff with greater initiative to move out of the mainstream, where the culture of accountable performance prevails. There is a healthy element to this, of course. But surely the large-scale organisations of our society are the poorer for driving out staff most likely to innovate and initiate. The more that work becomes a matter of filling in the boxes by which performance is to be measured and rewarded, the more it will repel those who think outside the box.