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Unformatted text preview: ies • Data ﬂow diagram: – Primary tool for represen6ng system’s component processes and ﬂow of data between them – Oﬀers logical graphic model of informa6on ﬂow – High‐level and lower‐level diagrams can be used to break processes down into successive layers of detail • Data Flow Diagram for Mail‐In University Registra6on System • Produced by Dr. Brian Janz • 3 1 Structured Methodologies (cont.) • Data dic6onary: Deﬁnes contents of data ﬂows and data stores • Process speciﬁca6ons: Describe transforma6on occurring within lowest level of data ﬂow diagrams • Structure chart: Top‐down chart, showing each level of design, rela6onship to other levels, and place in overall design structure • High‐Level Structure Chart for a Payroll System • Produced by Dr. Brian Janz • 4 1 Object‐Oriented Development • Uses an “object” as basic unit of systems analysis and design – Combines data and the speciﬁc processes that operate on those data – Data encapsulated in...
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This note was uploaded on 02/24/2011 for the course MIS 7650 taught by Professor Janz during the Spring '11 term at U. Memphis.
- Spring '11