DFD & Flowchart Symbols.xlsx - Bubble System Depicts an entity or a process within which incoming data flows Data flow symbol Represents a pathway

DFD & Flowchart Symbols.xlsx - Bubble System Depicts an...

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Unformatted text preview: Bubble System: Depicts an entity or a process within which incoming data flows Data flow symbol: Represents a pathway for data. External entity symbol: Portrays a source or a destination of data out Data store symbol: Represents a place where data are sto Notes A. A bubble can be either an entity on a physical flow diagram or a process on a logical dat B. The data store symbol may represent a view - a portion - of a larger enterprise database which incoming data flows are transformed into out going data flows. or a destination of data outside the system. a place where data are stored. r a process on a logical data flow diagram. larger enterprise database. Inputs Document Note: Also output document or report Manual Keying e.g., PC, other data entry device. key-to-disk input Processing Computer Process Note: Includes inquiries and file updates. Manual Process e.g., Prepare document, sign document Punch Card Offline Process Note: Can also be output; cards rarely used. e.g., MICR reader, key-todevice, scanner, RFID rea Miscellane Bridge for crossing flows Batch total, any total Goods: e.g., inventory, sh Processing Computer Process Output Data Stores Display Disk Note: Includes inquiries and file updates. Manual Process e.g., Prepare document, sign document General Purpose Input-Output Use when type of media is unknown or for manual card files, ledgers, batch logs, etc. Tape Paper Offline Process e.g., MICR reader, key-to-disk device, scanner, RFID reader Miscellaneous Filing sequence: A = Alphabetical C = Chronological N = Numerical Notice lack of arrowhead Batch total, any total Goods: e.g., inventory, shipment Data Stores Connectors Start/Stop Disk Note: Can also be external entity. Tape On-page connector Use A, B, C, etc. Paper Off-page connector. Use page number and A, B, C, etc. Logic Flow Telecommunications Link ...
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