Imam Muslim’s method has three connected steps:
1. Arrange transmitted reports in relation to the standing of their narrators.
2. Retain substantive additions or parallel chains needed for a specific critical purpose.
3. Repeat a complete report when necessary, otherwise quote a faithful relevant portion where possible; dispense with repetition lacking benefit.
The next discussion begins with the characteristics of the first tier, at “فَأَمَّا الْقِسْمُ الْأَوَّلُ”.