The requirements analysis uses system specifications and project planning as the basic starting point for the analysis activities, and checks and adjusts them from a software perspective. At the same time, the requirements specification is the main basis for software design, implementation, testing and maintenance. Good analytical activities help avoid or eliminate early errors as early as possible, increasing software productivity, reducing development costs, and improving software quality. Hengrun Technology provides users with model-driven requirements engineering solutions based on IBM Rational DOORS and Rhapsody.
An Introduction
Requirements engineering is a process of continuous definition of requirements, documentation, and requirements evolution, and finally freezes requirements based on verification. Requirements engineering covers requirements development and demand management, and its activities are divided into the following five independent phases:
• Demand acquisition: develop, capture and revise user needs by communicating with users, observing existing systems and analyzing tasks;
• Requirements Modeling: Create a conceptual model of the system that the end user sees as an abstract description of the requirements and capture as much of the real world as possible;
• Forming requirements specifications: generating a precise formal description of the requirements model components as a contract between the user and the developer;
• Requirements Verification: Analyze the correctness and feasibility of the requirements specification by means of symbolic execution, simulation or rapid prototyping with the requirements specification as input.
• Demand Management: Supports the evolution of demand for systems such as demand changes and traceability issues.
Illustration: Requirements Engineering Process
Main event introduction
1. Demand collection and writing
2. DOORS-based demand impact analysis and management
3. Demand extraction in DOORS, imported into Rhapsody requirements view, Rhapsody-based requirements modeling design and simulation verification process
4. Testing of model elements based on Rhapsody ATG
5. Demand traceability and coverage analysis based on Rhapsody GateWay
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