Most products ship with their motion checked the same way: someone drags a part around in CAD, watches the lid swing or the linkage fold, and decides it looks fine. Nobody writes down which requirement that check answered, what clearance it found or which revision it was run on.
The requirements sit in a spreadsheet, the motion study in a simulation seat a few people can open, and the test report in a quality system nobody else reads. When a later revision moves a bracket two millimeters, nothing tells anyone to ask whether the arm still clears the housing.
In N23D, Kinematics is a tab on a finished assembly, not a tool you fiddle with while drafting a part. It runs the completed product through its full motion and grades it against the requirements in PLM: range of motion, clearances, collisions, speeds and loads, each one pass or fail with the number beside it. The geometry from CAD, the analysis in CAE and the requirement all live on the same vault in one Rust binary, so a new revision gets graded again instead of inheriting an old answer.
One platform. Full digital thread. An assembly isn’t finished until it can say whether it still moves the way the requirement says it should.
Featured photo: a T-2C Buckeye of the U.S. Naval Test Pilot School folds up its landing gear on takeoff from NAS Patuxent River, August 2005, U.S. Navy photo by Photographer’s Mate 2nd Class Daniel J. McLain, public domain, via Wikimedia Commons.
