‘Thirty years ago we measured the success of our divisional managers on the basis of market share growth, sales and profits. In the late 1970s we switched to return on capital employed because the old system did not take account of the amount of capital invested to achieve growth targets. Now you are telling me that we have to change again to value-based performance metrics. Why?’ Explain in the form of an essay to this chief executive what advantages value-based management has over other approaches.