Delta Generation creates test cases only for requirements that changed between two versions of a specification. This saves time when a spec is updated. You do not need to re-verify unchanged requirements.
This feature must be enabled by your admin in Test Case Settings.
You have an updated specification and want to test only what changed
You manage a living spec with regular revision cycles
You want to avoid a full re-generation for small updates
Compare PDFs
Two PDF files (old + new)
You have two published PDF versions
Word Revisions
One DOCX file with Track Changes
Your team reviews in Word with Track Changes
A Table of Contents (TOC) is required in both modes. If TOC extraction fails, generation is blocked.
Old specification - previous version (PDF)
New specification - updated version (PDF)
Both documents must have a Table of Contents
Only PDF is accepted in this mode. DOCX is not supported.
TCG validates both documents before enabling generation:
Table of Contents present
Required (blocks if missing)
Used to detect new and changed sections
If a document is larger than 5 MB, TCG switches to vision-based TOC extraction automatically.
If validation fails, you will see a specific error.
Example: Table of contents not found.
This mode reads the Track Changes data embedded in a Word document. It extracts inserted text from the Word revision XML. It uses that insertion content as the delta.
This mode reads Word revision tags (specifically \<w:ins> insertions).
It does not read comments.
It does not read manual markers like NEW: or MODIFIED:.
A single DOCX file with Track Changes turned on
At least one tracked insertion
A Table of Contents
Only DOCX is accepted in this mode. PDF is not supported.
Open the document in Word.
Go to Review → Track Changes and toggle it on.
Make edits. New text is marked as an insertion.
Save as .docx.
Do not accept changes before upload. Unaccepted Track Changes are what TCG reads.
TCG blocks generation if either check fails:
Table of Contents present
Blocked - upload a document with a TOC
Track Changes insertions exist
Blocked - enable Track Changes and add at least one insertion
If no tracked insertions are found, the error explains how to enable Track Changes in Word.
The results view is the same as Standard Generation, with:
The TC count reflecting only new/changed test cases
A delta badge on the generation in History indicating a delta run
For Compare PDFs: keep section numbering consistent (4.1, 4.2.1, etc.).
For Word Revisions: only insertions are used for TC generation.
Deletions can be detected but are not used for TC generation.
Delta runs do not delete previous full generations. Use History to compare.
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