The ISHM Technology Maturation (ITeM) testbed at ARC focuses on evaluation, demonstration, and maturation of health management technologies. The testbed consists of multiple subsystems of a crewed spacecraft (using flight-like hardware or software simulations), flight crew console and interfaces, and a health management subsystem including sensors, data acquisition, processors, data storage, and reasoners. The testbed is used to test and verify the functionality of diagnostic reasoners, to benchmark their performance over a wide range of injected faults, to investigate issues involved in the development of various reasoners and to compare the development and performance of various diagnostic reasoners (e.g., Livingstone, TEAMS, BEAM/SHINE, and Rodon). The testbed can also be used to verify or calibrate Health Management design analysis and optimization processes. Additional areas of interest for collaboration using the testbed: Test and validation of systems analysis and optimization processes for design and application of HMT to subsystems and integrated subsystems. Test and validation of component embedded health monitoring or health management. Test and evaluation of avionics subsystems (e.g., processors, networks, and protocols) for ISHM applications. Development, test and evaluation of remediation strategies, redundancy vs reliability trade studies, time-to-criticality studies, etc. Evaluation of different ISHM information representation to both crew and ground control stations using the ITeM testbed, and the ISIS and Mission Control Technology (MCT) labs. TRL: N/A (will be operational early Spring 2005)