NRR has been criticised as hard to understand. Also, while it measures how quickly teams score and concede runs, this is not at all the same as how big the teams' margins of victory or defeat are (as it ignores wickets lost), and so ranking sides by NRR does not rank them by size of victory. This means a team which progresses in a tournament at the expense of another team, due to a higher NRR, may not have truly performed better than their opponents.