You can save a CSV (spreadsheet) from the vPlan window. Go to the menu "File->Export vPlan (.csv format)".
In the dialogue box that pops up, you can choose what details go into the CSV file, e.g. full or truncated hierarchy, simulation grades, check passes and fails etc.
There is also a full API called the vPlan visitor API, which lets you interact with the vPlan to generate any kind of report that you like.
It is fully documented in the vManager user guide, just search for "vPlan visitor". I have used this a number of times to generate very specific report formats, usually for interacting with other tools.
Have fun! :-)
Steve Hobbs / Applications Engineer / Cadence Functional Verification