Datum Precedence and Degrees of Freedom
Datum precedence is a fundamental principle in the design and manufacture of mechanical parts and assemblies. It refers to the order of importance assigned to different datums, which are specific points, lines, or planes on a part, which are used as references for measurement and geometric tolerances.
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3D, GD&T, Models, Tolerance
Wisc-Online FAQs
Explore this section for helpful answers to common questions regarding Wisc-Online.
Why did Wisc-Online change?
Wisc-Online has upported millions of learners for over 20 years. It was time for a refresh! By moving to WisTech Open, we were able to continue offering free, high-quality learning resources on a more modern, sustainable platform.
What happened with the Wisc-Online Arcade?
The Play Games Arcade went offline at the time Wisc-Online moved to WisTech Open.
Do saved links or bookmarks still work?
No, bookmarks to the old site stopped working after December 2025.
What happened to Wisc-Online objects that were downloaded into LMS platforms?
If instructors had downloaded and embedded Wisc-Online objects (like SCORM packages) into their LMS, those continued to work even after the Wisc-Online site transitioned to WisTech Open. These objects were self-contained and did not rely on the live site.
Is there an opportunity to develop new content?
Yes. Ideas for new content could be shared at https://www.wistechopen.org/contact by selecting “Pitch a Project Idea.” All project ideas were considered based on available funding.