Option 1 - Simulation

One method is to use the downloadable Supplemental Daylight and Views Calculations spreadsheet. The other option is to just create your own, which i prefer because the downloadable one sometimes has issues.

Just include the space name and number, total regularly occupied space, compliant space at 9am, compliant space at 3pm, total compliant space. I also include the file name of the results that are uploaded for that space. Final calculations at the bottom.

Look in the Reference guide for LEEDv 2009 in EQc 8.1 and there is an example calculation result.

Jos,Recently the Supplemental Daylight and Views Calculations spreadsheet has been updated and is much more robust now. I find it works well. It is available under credit information -- credit resources in LEED-Online. The latest version of this spreadsheet is only available if you are using the latest version of the form as well (generally v03 or higher) and it can be used for IEQc8.2 too, which means fewer uploads and more consistency.

I downloaded the spreadsheet form credit resources but it says 10 fc instead of 25. Additionally it only has space for one case (9 am or 3 pm). It is a bit confusing. Any thoughts will be appreciated?

An Addendum from last year changed the minimum illuminance level from 25fc to 10fc. Not sure what version of the calculator you have, but with the one column, it would be the the square footage that is compliant at both 9am and 3pm, which would be lesser value at the respectable times.