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Companies should seek advisory board members whose qualities complement the existing board of directors and not mask gaps in knowledge or skill in the main board. An advisory board strengthens the existing board, but not interfering with authorities of the existing board. The former editor of The Economist, also an advisory board member, once said, “They (advisory boards) are there to give focus to or sometimes challenge research and intelligence work being done in the company, thus avoiding groupthink and giving direction on big picture issues.