"A little often" is a popular diet rec ommended for people trying to lose weight, stay trim or avoid the bloating effect of biting off more than they can chew, so it should be a surprise that big mining companies are following pre cisely that advice from Dr McKinsey. The "doctor" in this case is not really a doctor, it's the global management consulting firm McKinsey & Company, which last month compiled a report for mining clients called 'How to navigate mining's cash-flow conundrum'.