Guest content from John Avellanet, managing director and principal of Cerulean Associates: Managing suppliers is fraught with challenges. Rare is the executive who has not made a mistake. In this article, I look at some of the most common mistakesâ"most of which Iâve made myselfâ"and how to avoid them. English is the Language of Business In our global supply chain, not having someoneâ"even if itâs an independent third-partyâ"who speaks both your language and the language of your supplier is a