I'm not sure I understand exactly what you are seeking. Are you asking if numbers or text from a subtask can appear at the summary level? If so, not directly. While you can create custom fields you cannot read data from one task and apply it to others. It is likely possible through VBA, but sadly I cannot assist in that area other than suggesting that it would be possible.

If you have some skills with VBA, you can try posting your question to the Project VBA forum:

https://social.technet.microsoft.com...ct2010custprog