Event List
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What it is
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a narrative list of the stimuli that occur in the outside world, to which the system must respond (Yourdon, 1989)
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Event types
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flow-oriented event (F) — the system becomes aware an event occurred because a piece of data arrived (e.g. a customer opens an account)
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temporal event (T) — triggered by a point in time arriving (e.g. a monthly report is due on the 1st)
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control event (C) — an external stimulus at an unpredictable point in time, common in real-time systems (e.g. a sensor detects a vehicle entering a parking lot)
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Event table fields
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event number, event name (with type), description, input, output, frequency, response, error conditions
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