One of my reader asked me about traceability matrix.
In one of my interview also i was asked to describe about the traceability matrix, but at that time i was not aware about it.So after study various books and resources i m trying to describe it.

Traceability Matrix

A method used to validate the compliance of a process or product with the requirements for that process or product. The requirements are each listed in a row of the matrix and the columns of the matrix are used to identify how and where each requirement has been addressed.

In simple language it is a document showing the relation between Test requirement and Test case.To check whether the test cases are mapped with the requirement

Description

A table that traces the requirements to the system deliverable component for that stage that responds to the requirement.

Size and Format

For each requirement, identify the component in the current stage that responds to the requirement. The requirement may be mapped to such items as a hardware component, an application unit, or a section of a design specification.

BASELINE TRACEABILITY MATRIX

Description

A table that documents the requirements of the system for use in subsequent stages to confirm that all requirements have been met.

Size and Format

Document each requirement to be traced. The requirement may be mapped to such things as a hardware component, an application unit, or a section of a design specification.

Traceability Matrix Table (Sample)
Identifier	Requirement	Priority (e.g., (M)andatory, (D)esirable, or (O)ptional)	Change Requests	Module (or Hardware Component, Application Unit, Deliverable Section, e.g., Design Specification)	Test Case or Test Scenario

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