dˈɛbɪɾɪdʒ ɐnˈæləsˌɪs ʌv baɪfˈeɪs ɹᵻdˈʌkʃən kæn biː jˈuːzd tə dɪtˈɜːmɪn wʌt stˈeɪdʒ ʌv ɹᵻdˈʌkʃən ɪz ɹˌɛpɹᵻzˈɛntᵻd ɪn wˈeɪst.
Debitage analysis of biface reduction can be used to determine what stage of reduction is represented in waste.