Type of Defect

There are various ways in which we can classify. Below are some of the classifications:

Severity Wise:

· Major: A defect, which will cause an observable product failure or departure from requirements.

· Minor: A defect that will not cause a failure in execution of the product.

· Fatal: A defect that will cause the system to crash or close abruptly or effect other applications.


Work Product Wise:

· SSD: A defect from System Study document

· FSD: A defect from Functional Specification document

· ADS: A defect from Architectural Design Document

· DDS: A defect from Detailed Design document

· Source Code: A defect from Source code

· Test Plan/ Test Cases: A defect from Test Plan/ Test Cases

· User Documentation: A defect from User manuals, Operating manuals


Type of Errors Wise:

· Comments: Inadequate/ incorrect/ misleading or missing comments in the source code

· Computational Error: Improper computation of the formulae / improper business validations in code.

· Data Error: Incorrect data population / update in database

· Database Error: Error in the database schema/Design

· Missing Design: Design features/approach missed/not documented in the design document and hence does not correspond to requirements

· Inadequate or sub optimal Design: Design features/approach needs additional inputs for it to be complete Design features described does not provide the best approach (optimal approach) towards the solution required

· In correct Design: Wrong or inaccurate Design

· Ambiguous Design: Design feature/approach is not clear to the reviewer. Also includes ambiguous use of words or unclear design features.

· Boundary Conditions Neglected: Boundary conditions not addressed/incorrect

· Interface Error: Internal or external to application interfacing error, Incorrect handling of passing parameters, Incorrect alignment, incorrect/misplaced fields/objects, un friendly window/screen positions

· Logic Error: Missing or Inadequate or irrelevant or ambiguous functionality in source code

· Message Error: Inadequate/ incorrect/ misleading or missing error messages in source code

· Navigation Error: Navigation not coded correctly in source code

· Performance Error: An error related to performance/optimality of the code

· Missing Requirements: Implicit/Explicit requirements are missed/not documented during requirement phase

· Inadequate Requirements: Requirement needs additional inputs for to be complete

· Incorrect Requirements: Wrong or inaccurate requirements

· Ambiguous Requirements: Requirement is not clear to the reviewer. Also includes ambiguous use of words – e.g. Like, such as, may be, could be, might etc.

· Sequencing / Timing Error: Error due to incorrect/missing consideration to timeouts and improper/missing sequencing in source code.

· Standards: Standards not followed like improper exception handling, use of E & D Formats and project related design/requirements/coding standards

· System Error: Hardware and Operating System related error, Memory leak

· Test Plan / Cases Error: Inadequate/ incorrect/ ambiguous or duplicate or missing - Test Plan/ Test Cases & Test Scripts, Incorrect/Incomplete test setup

· Typographical Error: Spelling / Grammar mistake in documents/source code

· Variable Declaration Error: Improper declaration / usage of variables, Type mismatch error in source code



Status Wise:

· Open

· Closed

· Deferred

· Cancelled