Interesting article in the Wall Street Journal:  A Modern Conundrum: When Work’s Invisible, So Are Its Satisfactions, by Jared Sandberg:

"Not only is work harder to measure but it’s also harder to define success," says Homa Bahrami, a senior lecturer in Organizational Behavior and Industrial Relations at UC Berkeley’s Haas School of Business. "The work is intangible or invisible, and a lot of work gets done in teams so it’s difficult to pinpoint individual productivity." …

At closing time, work doesn’t seem completed, just temporarily abandoned. As much as he loves his job, insurance broker Ryan Bowles envies Fred Flintstone’s exit from work in the quarry at day’s end. "He seems so happy sliding down that dinosaur’s tail when the whistle-bird blows," he says.