TestFeaturesCast

This pair of parts test capabilities of a printer and the quality of the casting process. They are often plated in sets of 4-10 to test retraction on the printer before the casting process. They yield easily quantifiable data for whatever metals that can be cast.
Data sets are:
edge case cast-ability
hole size shrinkage
pillar [hole] integrity

These were some of the parts used to gather data for the Rapid Manufacturing articles on Open3DP

http://depts.washington.edu/open3dp/2014/10/rapid-manufacturing-iteration-and-industry/

http://depts.washington.edu/open3dp/2014/11/rapid-manufacturing-mk3-detailed-walkthrough-troubleshooting-guide/