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SCRAM–CK: applying a collaborative requirements engineering process for designing a web based e-science toolkit

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Abstract

This paper presents SCRAM–CK, a method to elicit requirements by means of strong user involvement supported by prototyping activities. The method integrates two existing approaches, SCRAM and CK theory. SCRAM provides the framework for requirements management, while CK theory provides a framework for reasoning about design and its evolution. The method is demonstrated with the definition and refining of requirements for the BioVeL web toolkit. The objective of BioVeL is to allow scientists to understand, run, modify and construct workflows for data analysis with minimal training using a web-based interface. The proposed method is supported by prototyping activities for gathering user feedback, and refining requirements and design proposals. Using this method, the prototypes evolved from simple workflow execution enablers to include more complex functionalities for reviewing, modifying and building workflows in later versions. This paper presents a contribution to the application of techniques for requirements engineering. SCRAM–CK is an amalgamated method that combines a user-centred continuous refinement approach with support for design evolution through prototyping. The paper also shows the influence of the requirements engineering process in the evolution of design proposals.

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Notes

  1. http://github.com/myGrid/Taverna-Server-Demonstrator-Interface.

  2. This was the platform where the BioVeL web toolkit was first deployed (http://aws.amazon.com/).

  3. http://github.com/BioVeL/portal.

  4. http://github.com/myGrid/taverna-player.

  5. http://github.com/myGrid/taverna-lite.

  6. http://github.com/BioVeL/ansible-playbooks.

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Acknowledgments

The BioVeL project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no. 283359. More information at http://www.biovel.eu. The authors would like to thank the members of BioVeL who have actively participated in the requirements review activities reported in this paper, including our scientific partners: María Paula Balcazar Vargas, Sarah Bourlat, Päivi Lyytikäinen-Saarenmaa, Matthias Obst, Gerard Oostermeijer, Elisabeth Paymal, Hannu Saarenmaa, and Saverio Vicario; and our technical partners: Jonathan Giddy, Carole Goble, Robert Haines, Vera Hernandez, Robert Kulawik, Cherian Mathew, and Alan Williams. The authors wish to thank all the participants in the different training and dissemination activities, who have provided invaluable comments and feedback. Finally, the authors thank the anonymous reviewers for their feedback that helped to improve the overall quality of the manuscript.

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Authors and Affiliations

  1. School of Computer Science and Informatics, Cardiff University, Queen’s Buildings, 5 The Parade, Roath, Cardiff, Wales, CF24 3AA, UK

    Abraham Nieva de la Hidalga, Alex Hardisty & Andrew Jones

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  1. Abraham Nieva de la Hidalga
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  2. Alex Hardisty
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Correspondence to Abraham Nieva de la Hidalga.

Appendix: Further enhancements

Appendix: Further enhancements

User feedback has been taken into account for the further enhancement of the BioVeL toolkit. Table 4 shows the mapping of the deployed versions of the toolkit along with the review events where they have been presented. The first column indicates the version number and the date of deployment. The second column lists the review events, including location and date. The third column indicates features incorporated in the version being used at each event.

Table 4 Prototype progress and dissemination
Full size table

The more advanced versions of the prototype were implemented, deployed and demonstrated to users, but they were not released for further testing and validation. Instead of this, the functionalities will be implemented into the final production version of the portal when and if required.

1.1 Review of prototype versions

The prototype has been used and evaluated during different review events, which can be grouped according to the scenarios described in Sect. 3.4.1.

In the demonstration scenario context, the portal has been used to demonstrate the advances of the project and its different products on two occasions. The first demonstration occurred during the presentation of advances to the member of BioVeL during the second annual project meeting. The second demonstration was performed during a formal EC review of project progress.

In the outreach scenario context, the portal has been demonstrated to scientists from different British, European and American Institutions to showcase BioVeL products and to promote and support the adoption of virtual research environments in the biodiversity research community.

In the workflow development scenario, the prototype has gradually become the medium for testing advances on workflow development in scheduled “play-days”. The play-days are online working sessions in which a workflow is tested by different users and developers. Previously, these involved the use of the Taverna workbench but now they are mostly carried out on the Portal. This prompted the further strengthening of the toolkit features for supporting different users and managing run results.

In the teaching scenario, the portal has been used in training sessions and workshops. In addition to this, the prototype has also been used in workshops for population modelling, niche modelling and ecosystems functioning.

In addition to these scenarios, the portal has been increasingly used by BioVeL partners for their day to day use, supporting the production of research papers and reports for environmental agencies.

1.2 Requirements review

The implementation of the features addressing the requirements gathered during different stages of the SCRAM–CK process has been interleaved with the activities for validation and refinement of those same requirements. This has facilitated providing a useful test platform that has allowed further enhancement of the toolkit thanks to actual feedback from workflow developers and users. Table 5 shows the mapping of the requirements to the deployed and planned versions of the toolkit. The final columns indicate the components of the BioVeL workflow web toolkit that were modified for the implementation of each feature.

Table 5 Requirements implementation roadmap
Full size table

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de la Hidalga, A.N., Hardisty, A. & Jones, A. SCRAM–CK: applying a collaborative requirements engineering process for designing a web based e-science toolkit. Requirements Eng 21, 107–129 (2016). https://doi.org/10.1007/s00766-014-0212-0

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