Calculate the economic value added (EVA) for Company KKK, which has a net operating profit after taxes (NOPAT) of $400,000, invested capital of $2,000,000, and a weighted average cost of capital (WACC) of 10%. Analyze the significance of EVA as a performance metric for measuring a company's ability to generate returns above its cost of capital and create shareholder value, considering its implications for management incentive schemes and strategic decision-making.