Analyzing numerical data validating identification numbers


This can only be achieved through the use of all the clerical and computer controls built into the system at the design stage.The difference between data validity and accuracy can be illustrated with a trivial example.Data that does not conform to these rules will negatively affect business process execution.Therefore, data validation should start with business process definition and set of business rules within this process.The Post-validation action sends feedback to help enforce validation.Simple range and constraint validation may examine user input for consistency with a minimum/maximum range, or consistency with a test for evaluating a sequence of characters, such as one or more tests against regular expressions.



A Validation rule is a criterion or constraint used in the process of data validation, carried out after the data has been encoded onto an input medium and involves a data vet or validation program.Code and cross-reference validation includes tests for data type validation, combined with one or more operations to verify that the user-supplied data is consistent with one or more external rules, requirements, or validity constraints relevant to a particular organization, context or set of underlying assumptions.These additional validity constraints may involve cross-referencing supplied data with a known look-up table or directory information service such as LDAP.The rules may be implemented through the automated facilities of a data dictionary, Data validation is intended to provide certain well-defined guarantees for fitness, accuracy, and consistency for any of various kinds of user input into an application or automated system.

Data validation rules can be defined and designed using any of various methodologies, and be deployed in any of various contexts.

The method is to check that data falls the appropriate parameters defined by the systems analyst.