Win/loss analysis (sometimes called win-loss analytics) is the practice of interviewing buyers after they make a purchase decision to understand what actually drove that decision. Not what the sales rep logged in Salesforce. Not what the VP of Sales assumes during the QBR. What the buyer experienced, believed, and weighed when they picked a winner or walked away.
Most sales organizations think they already do this. They don't. They have a "Closed-Lost Reason" dropdown in their CRM, and leadership aggregates those codes into dashboards. Clozd compared CRM data from 1,000 deals with what buyers said and found the CRM's competitor tag disagreed with buyer interviews in nearly 7 of every 10 deals. Dashboards built on those fields can steer leadership wrong.