There are four criteria that have to be satisfied in order for market segmentation to be effective. A market segment should be identifiable, substantial, accessible and stable. Identifiable, at which there should be observable indicators that enable the segment to be defined and quantified. Substantial, meaning that the segment should be of enough size to make the effort involved in segmentation worthwhile. Accessible, that is, it should be probable to target specifically the segment using existing communication and distribution channels. Stable, so that after classification of the segment there should be sufficient time to capitalize on the investment implicated in segmentation. (Baker, 1995)
Markets can be segmented using a variety of philosophical approaches. In terms of operationalizing these approaches, demographic approaches, geographic approaches, socio-economic approaches and psychographic approaches are commonly used.
There are a number of demographic-related bases for segmenting markets such as age, the stage in the family life-cycle, gender, ethnic group and household composition. Age segmentation is one of the most widely used bases for market segmentation which is generally easy to measure the size of segments. Individuals usually go through a number of family roles, and that at each stage of development, an individual’s buying behaviours are likely to change as well as their ability to pay for those purchases will also
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