A vision is presented for fusing quantitative requirements analysis with model-based systems engineering. This vision draws upon and combines emergent themes in the engineering milieu. "Requirements engineering" provides means to explicitly represent requirements (both functional and non-functional) as constraints and preferences on acceptable solutions, and emphasizes early-lifecycle review, analysis and verification of design and development plans. "Design by shopping" emphasizes revealing the space of options available from which to choose (without presuming that all selection criteria have previously been elicited), and provides means to make understandable the range of choices and their ramifications. "Model-based engineering" emphasizes the goal of utilizing a formal representation of all aspects of system design, from development through operations, and provides powerful tool suites that support the practical application of these principles. A first step prototype towards this vision is described, embodying the key capabilities. Illustrations, implications, further challenges and opportunities are outlined

Tools have been developed that support risk identification and management activities during different phases of a project lifecycle. For the earlier stages of the project lifecycle, a tool for the qualitative identification and manipulation of risk and risk mitigation data was developed. For the later stages of the lifecycle, a separate tool for the quantitative manipulation of requirements, risk and risk mitigation data was developed. These two tools were then combined into a single tool. The combination of these qualitative and quantitative risk management tools is the focus of this paper. The combination was first envisioned as simply a convenience, ensuring that the results from the early lifecycle risk management would flow smoothly into the later lifecycle management. However, it was found that the combination led to the possibility of extending many of the capabilities of each tool into the other tool's phases. The net result is a combination that exhibits the best attributes of both qualitative and quantitative risk management tool support.