72 results about "Requirements modeling" patented technology

The invention discloses a time requirement modeling and verification method based on a problem frame method, which is used for modeling time requirements and verifying normative consistency of a time-critical system. The invention relates to the operations as follows: (1) defining an interaction and problem domain as a logical clock by using the concepts of the logical clock and clock relations in a clock constraint specification language (CCSL) based on a functional requirement model problem graph of the problem frame method; using clock constraint to define time constraint of an interaction environment (comprising the interaction and problem domain) of the time-critical software system to be developed, wherein the time constraint comprises quantitative and qualitative relations, establishing a time requirement model and exporting a time protocol of the system to be developed via time constraint of the environment; (2) defining formal semantics of the clock constraint, establishing a transformational rule from the clock constraint to an NuSMV description according to the semantic, using the rule to convert the time constraint into the NuSMV description, using a model detecting tool NuSMV to verify consistency of the time protocol according to a computation tree logic (CTL) expression of a consistent property.