Formal Behavioral Requirements Management

Abstract

In this paper, we develop the mathematical foundation for a formal requirements management of a systems engineering (SE) methodology called the Responsive and Formal Design (RFD) process. The RFD process relates a set of requirements, associated models, simulations, and the relationship between them, by integrating model-based systems engineering (MBSE) to manage system modeling complexity with formal methods to ensure that designs are verifiably correct against their requirements. In this paper, we formally define basic notions of the RFD process, develop algorithms to extract a set of logical expressions from a set of requirements, and present a technique that is used to map a behavior model to its simulation. We also present a formal way of refining requirements in the RFD process and show how properties are preserved along the way in a fundamental fashion. We demonstrate our development using three small satellites measurement system that images the colorful auroral ovals around Earth's magnetic poles.