Representation of Pre-RST information is very useful using visualized elements for realization of benefits of requirement traceability. This improves the practitioner motivation to maintain Pre-RST information during life cycle processes. Few researchers proposed visualization for Post-RST due to which many benefits of requirement traceability cannot be realized. This paper proposed an improved visualization representing Pre-RST information that demonstrates various benefit of requirement traceability. In order to evaluate empirically, an experiment is conducted and textual representation of traceability information is obtained. In order to strengthen our claim a survey is conducted to compare textual representation of traceability information with proposed visualization and results are compiled.

Analyst while transformation, may not capture true representation of user opinion thus creating deviation from actual user needs. Role of stakeholder is primary in both requirement elicitation and validation process. In elicitation stage they are initiator whereas in validation stage they are authenticator of their needs. Invalid requirements if verified may not be a deviation from specified behavior but deviation from user needs. Requirement validation process ensure that requirements should be representing all primary and intermediary artifacts as well a shared opinions of their contributors. This highlights the importance of source artifacts without which requirement validation cannot assured. Researchers didn't propose any framework for requirement validation in context of GDSD in which source artifacts grows exponentially, and stakeholders are located in diversified locations. Due to unstructured nature of source artifacts, they are not electronically indexed and versioned controlled and this makes difficulty in preserving them. Requirement validation is not possible when source artifacts are not available along with their contributors. The major contribution of this paper to address problem of requirement validation in GDSD in absence of stakeholder to make it collocating environment. This paper introduced ontological solution of requirement validation in which target artifacts are validated against source artifact using their semantic relationship. This paper proposed an unstructured source artifact based ontological model for requirement validation in GDSD environment.