So, if his new team can produce appealing styles at good prices, he believes he can regain the trust of the company's most important group of shoppers.

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Make sure your team members represent a diversity of thinking styles, skill levels, and backgrounds.

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Each week he and his merchandising team pin the 50 top-selling sunglass styles on a board and figure out ways to promote them.

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The job became vacant when Safa fired Ephraim 'Shakes' Mashaba on the eve of the squad's departure to the African Cup of Nations finals in Tunisia, with his assistant April 'Styles' Phumo taking temporary charge of the team in Tunisia.

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National soccer cultures tend to cultivate their own particular neuroses: the English crumble at the penalty spot, the Dutch care more about how their team plays than whether it wins, and the Brazilians ceaselessly alternate between two styles of play: soulful and stultifying.

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But he sees the biggest inefficiencies in an area the team can't control: "Referees, " he says, noting that the varying styles--some refs are less likely than others to call three second violations, for example--throws some statistical analysis off track.

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