What is Vertical and Horizontal traceablity?

Answer Posted / vivek

Vertical Traceability: Mapping within the requirements
Horizontal Traceability: Mapping between the requirements.
both together called Bi Directional Traceability.

For Example: Requirements 'A' and Requirements 'B'
Mapping the traceability within either Requirements A or
Requirements B is vertical
Mapping the traceability between Requirements A and
Requirements B is Horizontal

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