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what is traceability matrix?

Answer Posted / rm

A traceability matrix is a document, usually in the form of
a table, that correlates any two baselined documents that
require a many to many relationship to determine the
completeness of the relationship. It is often used with
high-level requirements (these often consist of marketing
requirements) and detailed requirements of the software
product to the matching parts of high-level design,
detailed design, test plan, and test cases.

Common usage is to take the identifier for each of the
items of one document and place them in the left column.
The identifiers for the other document are placed across
the top row. When an item in the left column is related to
an item across the top, a mark is placed in the
intersecting cell. The number of relationships are added up
for each row and each column. This value indicates the
mapping of the two items. Zero values indicate that no
relationship exists. It must be determined if one must be
made. Large values imply that the relationship is too
complex and should be simplified.

To ease the creation of traceability matrices, it is
advisable to add the relationships to the source documents
for both backward traceability and forward traceability. In
other words, when an item is changed in one baselined
document, it's easy to see what needs to be changed in the
other.

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