Authorship
Was the disputed text written by the person who provided the comparison samples?
Common author
Are there signs that several submitted texts were written by one person?
Group of authors
Are there signs that several authors contributed to the text, and can the extent of their contributions be determined?
Circumstances
Are there signs of editing, imitation or unusual circumstances of text preparation?
Limits
Is the volume sufficient and are the submitted samples comparable enough to answer the question?
Wording
The final questions are agreed after assessing the specific texts; establishing identity and file origin may require other examinations.