Phonology Processes (P. 67)
A generative phonology of a language is a system of rules which relates underlying phonological representations of lexical forms of lexical forms to their surface manifestations. Or, we can say that phonetic forms are derived from phonological forms by application of relevant rule in such a system. Phonological rules or processes allow the learners to increase fluency while expressing their ideas, and consequently to improve the quality and precision of their oral production.