How does RICE differ from ICE?

RICE and ICE are prioritization methods for tasks or features in a product, helping to evaluate their importance and implementation order.

• ICE stands for Impact, Confidence, Effort. The formula is:

  ICE = (Impact × Confidence) / Effort

  This method helps quickly assess tasks considering how important they are, how confident we are in estimates, and how much resources are needed.

• RICE adds another parameter — Reach. The formula:

  RICE = (Reach × Impact × Confidence) / Effort

  Reach is the number of users or events that will be affected by the task over a certain period.

Thus, the main difference is that RICE considers reach, which allows a more accurate assessment of the task's impact on the product and users, especially when tasks have different scales of influence.