An example of this in English is the /ɪ/-insertion between a voiceless alveolar fricative and a plural-z, as in buses [bʌsɪz] (with the underlying representation //bʌs-z//).
English also has a rule which devoices segments after voiceless consonants, as in books [bʊks], with the underlying representation //bʊk-z//).
In the output form [bʌsɪz] buses, final devoicing has not applied, because the phonological context in which this rule could have applied has by the application the application of /ɪ/-insertion.
An example of this can be seen in the pronunciation of the diminutive of the word slang ("snake") in the Dutch dialect of Kaatsheuvel: [slɑŋəskə].
If [s]-insertion[clarification needed] had applied first, then the rule which inserts an additional /-ə/ between the noun stem and the suffix /-kə/ could no longer have applied and the output form would have been [slɑŋskə].