Test and experimentation are integral to the capability development process. This is the second of a two-part discussion on experimentation. This article considers the similarities and differences between experimentation and testing. While the two endeavors address different questions and exhibit some differences in the planning and execution process, overall similarities outweigh differences especially in event resources suggesting potential gains from sharing resources. Original : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA514048