YOURDON Systems Method: Model-driven Systems DevelopmentThe method described here draws upon twenty years of experience of YOURDON, Inc., whose business has been applying, adapting, and enhancing system development techniques. This intuitive, model-driven approach to systems development is suitable for both the business information and real-time engineering communities. YOURDON Systems Method (YSM) 3.0 has guided thousands of project teams and individuals, helping them meet tight project deadlines while satisfying user requirements and delivering successful solutions within budget. |
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Page 65
... supertype may : 1. Participate in relationships . If a relationship may involve any of the subtypes of an entity , it is described as " involving the supertype " and the relationship icon will be linked to the supertype entity . The ...
... supertype may : 1. Participate in relationships . If a relationship may involve any of the subtypes of an entity , it is described as " involving the supertype " and the relationship icon will be linked to the supertype entity . The ...
Page 68
... Supertype visibility If the system ever treats occurrences of the supertype in the same way , irrespective of which subtype they are occurrences of , then the supertype should be shown . If the system always treats occurrences of the ...
... Supertype visibility If the system ever treats occurrences of the supertype in the same way , irrespective of which subtype they are occurrences of , then the supertype should be shown . If the system always treats occurrences of the ...
Page 103
... supertype is automatically a state variable for the subtype . There may be additional state variables that are relevant for the subtype , but not for the supertype . In the example , " status " is used only to keep track of whether a ...
... supertype is automatically a state variable for the subtype . There may be additional state variables that are relevant for the subtype , but not for the supertype . In the example , " status " is used only to keep track of whether a ...
Contents
Introduction | 1 |
Modelling Tools 35 3 | 35 |
The Enterprise Essential Model | 367 |
Copyright | |
3 other sections not shown
Common terms and phrases
abstract data type access flow allowed associative entity specification bSTD context diagram continuous data flow continuous event flow control process corresponding create data flow diagram data items data process data store defined delete described discrete data flow discrete event flow discrete process discussed Enterprise Essential Model entities and relationships entity relationship diagram entity-event table entry eSTD event store example flow specification function given Guidelines identifier Implementation Model information model inherited Instructor interface internal model machine manual meaning minispec model components Modelling Tools number of occurrences operation organisation output parameters parent ADT participate Patient pencil and paper post-condition process group processors real-world referred relationship frame relationship specification release of YSM response restriction Rules Scheduled course shown stimulus structure structure chart subtype supertype system ERD System Essential Model system modelling techniques terminator Transition Diagram type conversion update variable