KDD Process in Data Mining

  • KDD ( Knowledge Discovery in Databases ) is the procedure of recognizing valid, useful, and understandable patterns from huge and complex data sets.
  •  KDD Process

    KDD Process in Datamining

  • Data Mining is the start of the KDD procedure, including the inferring of algorithms that investigate the data, develop the model, and find previously unknown patterns.
  •  KDD Process

The KDD Process

  • The process begins with determining the KDD objectives and ends with the implementation of the discovered knowledge. The loop is closed, and therefore the Active data mining starts. Changes would wish to be made within the application domain. For ex, offering various features to cell phone users in order to reduce churn. This closes the loop, and the impacts are then measured on the new data repositories, and therefore the KDD process again. Following may be a concise description of the nine-step KDD process, Beginning with a managerial step:
 KDD Process in Datamining

KDD Process in Datamining

Building up an understanding of the application domain

  • This is the initial preliminary step. It develops the scene for understanding what should be done with the various decisions like transformation, algorithms, representation, etc. Individuals who are in charge of a KDD venture need to understand and characterize the objectives of the end-user and the environment in which the knowledge discovery process will occur ( involves relevant prior knowledge).

Choosing and creating a data set on which discovery will be performed

  • This process is important due to data mining learns and discovers from the accessible data. This is often the evidence base for building the models.
  • If some significant attributes are missing, at that time , then the whole study could also be unsuccessful from this respect, the more attributes are considered.
  • On the other hand, to arrange , collect, and operate advanced data repositories is expensive , and there's an appointment with the chance for best understanding the phenomena.

Preprocessing and cleansing

  • Data cleansing or data cleaning is that the process of detecting and correcting corrupt or inaccurate records from a record set, table, or database and refers to identifying incomplete, incorrect, inaccurate or irrelevant parts of the info then replacing, modifying, or deleting the dirty or common data.
  • Data preprocessing is a crucial step within the data mining process. The phrase "garbage in, garbage out" is especially applicable to data processing and machine learning projects.

Data Transformation

  • In business, need to think about impacts beyond control as well as efforts and transient issues. For eg, studying the impact of advertising accumulation.This step can be essential for the success of the entire KDD project, and it is typically very project-specific. For eg, in medical assessments, the quotient of attributes may often be the most significant factor and not each one by itself.

Prediction and description

  • Prediction is said as supervised Data Mining, while descriptive Data Mining incorporates the unsupervised and visualization aspects of Data Mining.

Selecting the Data Mining algorithm

  • Each algorithm has parameters and strategies of leaning, such as ten folds cross-validation or another division for training and testing. This methodology attempts to understand the situation under which a Data Mining algorithm is most suitable.

Utilizing the Data Mining algorithm

  • To utilize algorithm several times until a satisfying outcome is obtained. For eg, by turning algorithms control parameters, such as the minimum number of instances in single leaf of a decision tree.


  • We assess and interpret the mined patterns, rules, and reliability to the objective characterized in the first step. consider the preprocessing steps as for their impact on the Data Mining algorithm results. For eg, including in step 4, and repeat from there. This step focuses on the comprehensibility and utility of the induced model. The identified knowledge is also recorded for further use and overall feedback and discovery results acquire by Data Mining.

Using the discovered knowledge

  • The knowledge was discovered from a certain static depiction, it is usually a set of data, but now the data becomes dynamic. The knowledge becomes effective sense that may make changes to the system and measure the impacts. The accomplishment of this step decides the effectiveness of the whole KDD process.

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