Bugzilla allows you to view and track the state of the bug database in
all manner of exciting ways.
Current State
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Search -
list sets of bugs.
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Tabular reports
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tables of bug counts in 1, 2 or 3 dimensions, as HTML or CSV.
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Duplicates -
list of most frequently reported bugs.
Change Over Time
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Old Charts -
plot the status and/or resolution of bugs against
time, for each product in your database.