INTRODUCTION I B ()  reviewed a range of modern theoretical phonological approaches and how they accounted for some of the commonly reported patterns of vowel disorder. However, we did not question what a clinical phonology should be, and what an analysis via a phonological approach should provide us. erefore, in this chapter, we will examine fi rst what phonology (and in turn clinical phonology) actually means, before turning to looking at an approach that might be considered more relevant for the needs of clinical phonologists; that is, an approach that models as directly as possible what is wrong, how it became wrong, and how we might look at remediating what is wrong.