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AC 340 Ch. 4
Baxter's Midterm 1
21
Accounting
Undergraduate 3
02/17/2011

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Cards

Term
Bubble Symbol
Definition
depicts and entity or a process within which incoming data flows are transformed into outgoing data flows
Term
Data Flow Symbol
Definition
represents a pathway for data
Term
External Entity Symbol
Definition
portrays a source or a destination of data outside the system
Term
Data Store Symbol
Definition
represents a place where data are stored
Term
Data Flow Diagram(DFD)
Definition
graphical representation of a system. it depicts system's components; the data flows among the components; and the sources, destinations, and storage of the data
Term
Context Diagram
Definition
top-level, least detailed, diagram of a system that depicts the system and all of its activities as a single bubble and show the data flows into and out of the system and into and out of the external entities.
Term
External Entities
Definition
outside the system that send data to, or receive data from, the system.
Term
Physical Data flow diagram
Definition
graphical representation of a system showing the system's internal and external entities and the flows of data into and out of these entities. They specify where, how and by whom a system's activities are accomplished, not what activities.
Term
Internal Entity
Definition
entity within the system that transforms data. These include accounting clerks, departments, and computers.
Term
Logical data flow Diagrams
Definition
graphical representation of a system showing the system's processes, data stores, and the flows of data into and out of the processes and data stores. Specifies what activities the system is performing.
Term
Level "0" diagram
Definition
top-level view of the context diagram that has all numbers with a decimal 0 after it.
Term
Balanced
Definition
When there are two DFD's, the context and level "0" with equivalent external data flows.
Term
Top-Down Partitioning
Definition
successive subdividing, or "exploding" of logical DFD's, which leads to a set of balanced DFD's.
Term
Systems Flowchart
Definition
graphical representation of a business process, including info processes as well as operations processes. They depict the sequence of activities performed as the business events flow through the process.
Term
Two Main Ways to use DFD's
Definition
1. document and existing system
2. crease from scratch when developing a new system.
Term
Activity
Definition
any action being performed by an internal or external entity. They can relate to data or an operations process.
Term
Information Processing Activity
Definition
retrieve data from storage, transform data, or file data. These include document preparation, data entry, verification, classification, arrangement and sorting, calculation, summarization, and filing.
Term
Exception Routines(Error Routines)
Definition
when processing can't be proceed as planned and out of the ordinary situations happen where processing is performed in other than normal situations.
Term
Reject Stub
Definition
data flow assigned the label "reject" that leaves a bubble but does not go to any other bubble or data store.
Term
Computer-processing Rectangle
Definition
The only way to get data into or out of a computer data storage unit.
Term
Changes if using Enterprise systems
Definition
1. instead of 2 computer data stores, we would have one data store/disk symbol that would be labeled "enterprise database".
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