Simplified Tolerancing of Alignment Errors in Dynamic Freeform Optical Systems Jason A. Shultz, Matthew A. Davies, and Thomas J. Suleski in Optical Design and Fabrication 2017 (Freeform, IODC, OFT), OSA Technical Digest (online) (Optical Society of America, 2017), paper JTh1C.3. We discuss and demonstrate approaches for analyzing and quantifying the sensitivity of dynamic freeform optical systems to positioning errors, and the resulting impacts on optical performance. Imaging and non-imaging examples are considered.