In weapon systems development, live fire tests have been frequently adopted to evaluate the performance ofthe systems under development. Therefore, it is necessary to ensure safety in the test ranges where the livefire tests can cause serious hazards. During the tests, a special care must be taken to protect the test andevaluation (T&E) personnel and also test assets from potential danger and hazards. Thus, the development andmanagement of the range safety process is quite important in the tests of guided missiles and artilleryconsidering the explosive power of the destruction. Note also that with a newly evolving era of weaponsystems such as laser, EMP and non-lethal weapons, the test procedure for such systems is very complex.Therefore, keeping the safety level in the test ranges is getting more difficult due to the increasedunpredictability for unknown hazards. The objective of this paper is to study on how to enhance the safety inthe test ranges. To do so, an approach is proposed based on model-based systems engineering (MBSE).Specifically, a functional architecture is derived utilizing the MBSE method for the design of the range safetyprocess under the condition that the derived architecture must satisfy both the complex test situation and thesafety requirements. The architecture developed in the paper has also been investigated by simulation using acomputer-aided systems engineering tool. The systematic application of this study in weapon live tests isexpected to reduce unexpected hazards and test design time. Our approach is intended to be a trial to getcloser to the recent theme in T&E community, “Testing at the speed of stakeholder’s need and rapidrequirement for rapid acquisition.”