8. Our advice
8.1 Clarify your needs
If you had to do just one thing, it would be to describe operational scenarios for using your future system (product, service, organization). It's easy to write or imagine a story.
To define the needs of the system under study, model its context of use as an all-encompassing system, by reverse engineering its functional and physical architecture. This makes it easier to identify and define functions/services, functional interfaces (material, energy and information flows) and physical interfaces (connectors and physical links supporting flow exchanges).
A requirement = a single idea, a single sentence in the active form, such as "subject + verb in the present tense + complement". Its fulfillment must be verifiable...
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International standards
ISO/IEC 15288:2008 - Systems and software engineering - system life cycle processes, Geneva, Switzerland: International Organization for Standardization (ISO)/International Electronical Commission
ISO/IEC 29148: 2011 - Systems and software engineering - Life cycle processes - Requirements engineering, Geneva, Switzerland:...
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www.incose.org International Council on Systems Engineering (INCOSE) is a not-for-profit membership organization founded in 1990. Its mission is to share, promote and advance the best of systems engineering from across the globe for the benefit of humanity and the planet.
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