Traceability matrix is the mapping between the requirements 
and Test cases.

Traceability matrix contains Requirement id, Test cases ids 
and number of testcases passed and faild.

maping b/w testcases and requirements
fields are tecase id,requirement id,no of test cases are 
passed or failed.

RTM Is used to trace the req,easy enhance the req,easy to
trace of the bug, the Template is
REQ ID, REQ TYPE, REQ Description,Trace to system REQ,trace
to Design Specification, Trace to test Script,pass / fail

Traceability Matrix Template has the following fields:-

1.Requirement id
2.Requirement Brief Description 
3.Dependant Requirement ID's
4.HLD Reference
5.LLD Reference
6.Code Reference
7.Testcase Reference
8.Remark

The simple template for the Traceability matrix will have 
the following fields:

1. Requirement ID
2. Requirement received Date
3. Module Name
4. Responsible Tester Name
5. Reviewer Name
6. Test case name
7. Build / Version number
8. Associated Defects
9. Reviewer Comments.

The traceability matrix can either be maintained in the 
excel sheet or in the specified tools.

Traceability Matrix is nothing but mapping between
requirement and test cases.

The fields are,

Req.Spec No, Req.Statement, Module, Test Spec, Test Case No,
Verification and Module field

Actually, the fields are dependant on the project that you 
are working on.

I am currently working on creating a new RTM, but due to 
the nature of our work, it needs to cover both IT and non-
IT projects (my current project is not IT-based).

The purpose of the matrix is to have a quick reference / 
chart to track requirements and (for lack of a better term) 
action items, to ensure that all requirements are covered, 
and so that the action item's are all required (if an 
action item is not related to a requirement, it's far more 
transparent when put into a cross-referenced chart).