RICE is a prioritization scoring model that ranks product opportunities using Reach × Impact × Confidence ÷ Effort, producing a numeric score across a backlog. It was developed at Intercom (Sean McBride, blogged 2017) and is used as one of the most common starting frameworks for product teams that want structured prioritization without inventing a custom model. It is widely adopted because it's simple enough to compute on a spreadsheet and rigorous enough to force the team to specify what they're claiming about each initiative.
The formula component by component: Reach is the estimated number of people (customers, users, requests) affected by the initiative in a defined time period (usually per quarter or per month), grounded...