Serena crunched all the numbers and made the best estimates possible when she was preparing the coming quarter’s sales projections for the product she managed. She used lessons from her graduate studies in statistics and decision science. Informed by historical trends, economic forecasts, and market projections, she estimated a total sales volume of 1,000 units. In addition, she estimated a 15% probability that sales would fall below 900, and a 15% probability that sales would surpass 1,100. When she finished presenting her forecast, the first comment was from the CEO; she leaned back, scowled at Serena, and said, “I don’t pay you to be uncertain.”