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Requirements, Architecture, and Quality in a Mission-Critical System: 12 Lessons Learned

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationESEC/FSE 2015 Proceedings of the 2015 10th Joint Meeting on Foundations of Software Engineering
Number of pages4
ISBN (Print)978-1-4503-3675-8
Publication statusPublished - 2015
Publication typeA4 Article in a conference publication
EventEuropean Software Engineering Conference -
Duration: 1 Jan 1900 → …


ConferenceEuropean Software Engineering Conference
Period1/01/00 → …


Public tender processes typically start with a comprehensive specification phase, where representatives of the eventual owner of the system, usually together with a hired group of consultants, spend a considerable amount of time to determine the needs of the owner. For the company that implements the system, this setup introduces two major challenges: (1) the written down requirements can never truly describe to a person, at least to one external to the specification process, the true intent behind the requirement; (2) the vision of the future system, stemming from the original idea, will change during the specification process – over time simultaneously invalidating at least some of the requirements. This paper reflects the experiences encountered in a large-scale mission critical information system – ERICA, an information system for the emergency services in Finland – regarding design, implementation, and deployment. Based on the experiences we propose more dynamic ways of system specification, leading to simpler design, implementation, and deployment phases and finally to a better perceived quality.

Publication forum classification

Field of science, Statistics Finland