Testcase-to-Bug Relationship

[viraj dhumal]

        I am a software developer from india. we have
developed a TESTCASE MANAGEMENT SYSTEM which works as
an ADD-ON OVER BUGZILLA. In our system the
Testcase-to-Bug relationship is one-to-one. But the QA
persons in our company have suggested that the a
testcase should be associated with multiple bugs. we
are confused that if the relationship can be
one-to-many(testcase-bug) then why not many-to-many. 
      But many-to-many relationship will be too
complex. Also developers from the mailing list
suggested to keep the relationship as one-to-many. 
      Now in our TCM we are creating a Testcase as 
a sequence of STEPS. each step of a testcase has 
1.action
2.expected result
3.actual result
4.status(pass, fail)

The testcase status is the AND-ING of steps status. 

now consider the case of one-to-many
relation(testcase-bug).
my query is whether to explicitly relate a bug to a
step of the testcase.In that case the no. of bugs
associated with a testcase will be limited to the no
of steps in that testcase.

or 

whether to keep no explicit relation between bug and
test step, but only a one-to-many relation betn
testcase and bug.

 Please Reply...............

Regards,
viraj.

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