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 75
... variable . The eSTD is used to model the different states that this state variable may take over time for one occurrence of the entity . ( ยง2.5.2.3.5 shows how state variables are defined . ) Not all entities have state variables . Only ...
... variable . The eSTD is used to model the different states that this state variable may take over time for one occurrence of the entity . ( ยง2.5.2.3.5 shows how state variables are defined . ) Not all entities have state variables . Only ...
Page 105
... variables that are checked or changed by the system . If the system needs to know the status of a state variable , then the value entered is " check " ; if the system is responsible for changing the status of the state variable , the ...
... variables that are checked or changed by the system . If the system needs to know the status of a state variable , then the value entered is " check " ; if the system is responsible for changing the status of the state variable , the ...
Page 107
... variable necessarily changes over time for one occurrence of an entity , state variables cannot be used as part of an identifier . If a proposed attribute of an entity is identified with the proposed values being a discrete set of ...
... variable necessarily changes over time for one occurrence of an entity , state variables cannot be used as part of an identifier . If a proposed attribute of an entity is identified with the proposed values being a discrete set of ...
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