This study documents and outlines a part of the process used in the daylighting performance analysis of a typical classroom design for a proposed K-12 school in Greensburg, KS. The computer simulation program DAYSIM was used for the optimization process because of its ability to compute climate based annual daylight availability and report the results in the form of dynamic daylight metrics such as Daylight Autonomy (DA%), Useful Daylight Illuminances (UDI) and Daylight Saturation Percentage (DSP%).A methodology was developed to utilize BIM geometry from Autodesk's Revit Architecture software with very little intervention. Since there was no established process for utilizing BIM geometry with DAYSIM, some experimentation was involved. But the overall efficiency and accuracy of the modeling process was greatly improved, compared to recreating 3D geometry from scratch.The focus was on achieving a good glare-free daylighting design and also meeting the LEED rating system's EQ credit 8.1 for daylighting, which currently relies on snapshot conditions like Daylight Factor and Summer Solstice as opposed to annual availability. The resulting classroom space had a DSP of 82%, UDI (10 fc - 200 fc) of 85%, DA of 85% and a Daylight Factor of 2.5 (all averages at work plane level).
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