Question

Provide a definition of “classification hierarchy” and illustrate your definition with an example of how and why a grocery store chain would use it in a data mining process.

Answer 1

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classification hierarchy:

=>Hierarchical Classification is a system of grouping things according to a hierarchy, or levels and orders. A hierarchy can be seen in positions of authority in which people are ranked in an unwavering order of authority, with a "boss" at the top and "entry level" employees at the bottom. The military uses hierarchical classification to organize its members: generals are at the very top, followed by colonels, captains, and then sergeants.
=>The categorization of species is another example of hierarchical classification. At the very top is the kingdom which is the broadest category, followed by phylum, class, order, family, genus, and species. For humans, the classification would be Animalia (kingdom), chordata (phylum), class (mammalia), order (primates), family (hominidae), genus (homo) and species (sapien). It goes from a very broad category (all animals) all the way down to our unique species (sapiens).
Classification hierarchy refers to the concept where the information is stored in a tree like structure. Each level up the tree provides a broader information. For example, in a Grocery store, we can arrange Soaps in hierarchical order as shown below:

In Data Mining the main objective is to extract useful information from huge amount of data. The Classification Hierarchy plays an important role in Data Mining. By arranging data in hierarchical order makes it faster to retrieve information than when arranged in Linear order. For example, if we want to retrieve what all Children Bathing Soap available in the Store, the query result instead of searching the entire Grocery Store database, goes to only those nodes of the tree that matches its criteria. This result in faster query result.