According to Susan Walsh, "The quality of your data determines the quality of your negotiation." Procurement professionals need a classification system in place to ensure that they're not relying on dirty data. Your data needs to be consistent, organized, accurate, and trustworthy (COAT). If it isn't, you're likely costing your business money. Susan Walsh—i.e. The Classification Guru—shares the biggest problem with procurement data (and what to do about it) in this throwback episode of Negotiations Ninja.