Recordo de Domingo último "Avoid moving from ‘Puzzle solvers’ to ‘number crunchers’". Depois, recomendo a leitura de "Cheap shower curtains":
"The unskilled cost accountant might suggest you outfit your new hotel with cheap shower curtains. After all, if you save $50 a room and have 200 rooms, pretty soon, we're talking real money.
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On the other hand, experience will demonstrate that cheap shower curtains let the water out, causing a minor flood, every day, room after room. And they wear out faster. Cheap shower curtains aren't actually cheap.
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Productivity pays for itself.
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Once you start looking for metaphorical cheap shower curtains, they're everywhere."
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