Describe the steps involved in data mining when viewed as a process of Knowledge discovery.
1 Answer

Knowledge discovery as a process consists of an iterative sequence of the following steps:

  1. Data cleaning:

 It can be applied to remove noise and correct inconsistencies in the data.

  1. Data integration:

 Data integration merges data from multiple sources into a coherent data store, such as a data warehouse.

  1. Data selection:

 where data relevant to the analysis task are retrieved from the database.

  1. Data transformation:

 where data are transformed or consolidated into forms appropriate for mining by performing summary or aggregation operations.

 example, normalization may improve the accuracy and efficiency of mining algorithms involving distance measurements.

  1. Data mining:

 an essential process where intelligent methods are applied in order to extract data patterns.

  1. Pattern evaluation:

 to identify the truly interesting patterns representing knowledge based on some interestingness measures.

  1. Knowledge presentation:

 where visualization and knowledge representation techniques are used to present the mined knowledge to the user.


Figure1.1: Data mining as a step in the process of knowledge discovery.

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