{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

class7 - 33:010:458 33:010:458 Accounting Information Inf...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
33:010:458 A ntin Inf rm ti n Accounting Information Systems Dr. Peter R. Gillett Associate Professor Department of Accounting, Business Ethics and Information Systems Rutgers Business School–Newark and New Brunswick
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Accounting Information Systems A.I.S. Class 7: Outline Learning Objectives for Chapter 8 Entity-Relationship Models Extended Entity-Relationship Models Data Flow Diagrams Group Work for Chapter 8 (1) Event-Oriented Models Event Oriented Models Resource-Event-Agent Models (REA) Group Work for Chapter 8 (2) September 23, 2009 Dr. Peter R. Gillett 2
Background image of page 2
Accounting Information Systems Learning Objectives for Chapter 8 After studying this chapter you should be able to: * distinguish between logical and physical database models * describe the entity relationship and extended entity describe the entity-relationship and extended entity- relationship logical modeling approaches * describe the elements of data-flow diagrams * distinguish between different levels of data-flow diagrams, such as context diagrams, Level 0, and Level 1 data flow diagrams September 23, 2009 Dr. Peter R. Gillett 3 Level 1 data flow diagrams
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Accounting Information Systems Learning Objectives for Chapter 8 After studying this chapter you should be able to: * identify entities and relationships in a business environment using an event-oriented focus * construct an extended entity relationship diagram construct an extended entity relationship diagram based on a narrative description of a business scenario * construct context diagrams and data-flow diagrams based on a description of a business process September 23, 2009 Dr. Peter R. Gillett 4
Background image of page 4
Accounting Information Systems Entity Entity-Relationship Models Relationship Models E tit Relationship E tit Entity Entity September 23, 2009 Dr. Peter R. Gillett 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Accounting Information Systems Extended E Extended E-R Models R Models Optionalities * optional or mandatory Cardinalities * 1:1 1:M M:1 or M:M 1:1, 1:M, M:1, or M:M Attributes * k d k tt ib t keys and non-key attributes September 23, 2009 Dr. Peter R. Gillett 6
Background image of page 6
Accounting Information Systems EER Models September 23, 2009 Dr. Peter R. Gillett 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Accounting Information Systems Data Flow Diagrams DeMarco Gane & Sarson Process Data source / sink Data flow Data store September 23, 2009 Dr. Peter R. Gillett 8
Background image of page 8
Accounting Information Systems DFD Conventions Processes should have unique names and be sequentially numbered (1.0, 2.0, 3.0; 2.1, 2.2, 2.3; etc.) A process must have at least one input flow and at least one output flow A data flow has at least one end connected to a process Data cannot flow directly back to an earlier process A data store must have at least one input and at least one output data flow Any single DFD should not have more than about seven Any single DFD should not have more than about seven processes Omit error and exception handling from Level 0 diagrams September 23, 2009 Dr. Peter R. Gillett 9
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Accounting Information Systems Data Flow Diagrams Leveled DFDs * A series of DFDs used in a hierarchy Balanced DFDs * The same sources, sinks and data flows appear at all levels Labeling *
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}