Complexity and Usability of Voice-Enabled Alerting and Situational Reporting Decoupled Systems

Telephone calls are the predominant telecommunication mode in Sri Lanka. Leveraging voice-based applications for disaster communication would be acceptable and sustainable. The findings in this paper are from an experiment concerning interactive voice for connecting community-based emergency field operatives with their central coordination hub. Challenge was in interchanging the Freedom Fone (FF) Interactive Voice Response (IVR) generated, Sinhala and Tamil language, speech data with the text-based 'Sahana' disaster management system for analysis and decision support. Emergency Data Exchange Language (EDXL) interoperable content standard was adopted for mediation. Low quality voice data resulting in incomplete information was a barrier to automating transformations between text and speech. Replacing those processes with human procedure significantly degrades the reliability. Moreover, human interaction with decoupled software systems, to accomplish the sequence of tasks, points to instabilities. This paper discusses the complexities and usability shortcomings discovered through controlled-exercises in Sri Lanka.