Aiming to obtain a new, advanced, globally harmonised mid-sized male side impact dummy the WorldSID (Worldwide Side Impact Dummy) has been developed under the auspices of the International Organisation for Standardisation (ISO) working group on anthropomorphic test devices:​ ISO/TC22/SC12/WG5. From 2001 to mid-2002, the first prototype of the WorldSID was subjected to an extensive worldwide evaluation programme at research institutes, government agencies and industry test laboratories around the world. The initial testing resulted in the highest ISO biofidelity rating for any mid-sized male side impact dummy to date along with some suggestions for further biofidelity refinements.

These identified refinements have been developed and incorporated into a revised version of the WorldSID prototype dummy, which has been subjected to another series of worldwide evaluation tests in order to assess the resulting biofidelity rating according to the requirements of ISO Technical Report 9790.

This paper presents and discusses the design modifications implemented in the revised WorldSID prototype dummy and its superior performance during the second round of biofidelity testing. The biofidelity rating of the WorldSID according to ISO TR 9790 and its response repeatability in the biomechanical tests will be addressed and compared with existing mid-sized male side impact dummies. The revised WorldSID prototype has exceeded the overall and individual body region biofidelity ratings of the first prototype. The revised prototype biofidelity rating is anticipated to be 7.3 with minor modifications to the dummy head that were underway at the time of writing this paper.