TEST 3 Networks Analysis and Design ch 15 - designing accurate data entry procedures

Bar codes

Affords a high degree of accuracy for data entry Saves labor costs Allows the automatic capturing of data Tracking of credit card purchases

RFID

Allows the automatic collection of data using __ tags that contain a chip and an antenna Passive__ tags Active __ tags Privacy is a concern

keyboards

Special function keys to open programs Keys used to scroll and explore the Web Keys that can be programmed with macros to reduce the number of keystrokes required Ergonomic keyboards and infrared or Bluetooth-enabled keyboards

stability

means that the identification code for a customer should not change each time new data are received.

GUI

screens can help to reduce the number of human input errors when they incorporate radio buttons, check boxes, and drop-down lists.

Classification Information

Affords the ability to distinguish between classes of items Must be mutually exclusive Classification codes Block sequence codes

Philippians 4:8

Finally, brothers, whatever is true, whatever is lovely, whatever is pure, whatever is admirable - if anything is excellent or praiseworthy - think about such things. - GIGO

during input

The critical importance of catching errors ___, prior to processing and storage cannot be overemphasized.

DTD, Schema

Validating XML documents

GIGO

garbage in, garbage out

Alphabetic derivation codes

A commonly used approach in identifying an account number

Block Sequence Codes

An extension of the sequence code Data are grouped according to common characteristics. Simplicity of assigning the next available number (within the block) to the next item needing identification

UPC Universal Product Code

Barcodes used at various points in the supply chain to track inventory and shipments and to identify items at the point of sale

Information

Business decisions are only as good as the quality of the ___ used to make the decisions

memory and storage

Coded data can save valuable ___ space.

Concealing Information

Codes may be used to conceal or disguise information. Cipher Codes

data transformation process

Coding can help in sorting of data during the __

items entered

Coding helps to reduce the number of _____

coded

Data that are ___ require less time to enter.

unique

For codes to work, they must be ____

Compactly Capture Functions

Function Codes ______ that the Computer Must Perform

subcodes

If codes must be long, they should be broken up into

Simple sequence code & Alphabetic derivation codes

Keeps track of something

Memory Aids

Mnemonic Codes Function as ____ by Using a Meaningful Combination of Letters and Numbers

sort

Numerical codes are much easier to ___ than alphanumeric data.

Electronic Product Code EPC

RFID code that identifies the Manufacturer, Producer, Versions, and S/N of individual consumer products

Function Codes

Short numeric or alphanumeric codes used to spell out precisely what activities are to be accomplished

Revealing Information

Sometimes it is desirable to reveal information to specific users through a code; Makes the data entry more meaningful for humans; Significant-digit subset codes; Mnemonic codes; Unicode

Cipher Codes

The direct substitution of one letter for another, one number for another, or one letter for a number

using codes

Validation programs Report and inquiry programs GUI programs

Simple sequence code - disadvantages

When you do not wish to have someone read the code to figure out how many numbers have been assigned When a more complex code is desirable to avoid a costly mistake

Keyboards Optical character recognition Magnetic ink character recognition Mark-sense forms Bar codes RFID

choosing a data entry method

Mnemonic Codes

is a human memory aid; Any code that helps the data-entry person remember how to enter the data or the user remember how to use the information is a __. Using a combination of letters and symbols affords a clear way to code a product so that the code is easily seen and understood.

Simple sequence code

A number that is assigned to something if it needs to be numbered; No relation to the data itself

Magnetic ink character recognition

A reliable and high-speed method that is not susceptible to accepting stray marks If it is required on all withdrawal checks, it serves as a security measure against bad checks Data entry personnel can see the numbers making up the code if it is necessary to verify it.

Effective coding Efficient data capture Effective data capture Assuring data quality through validation

Accurate Data-Entry Objectives

information

Effective codes contain _____

Simple sequence code - advantages

Eliminates the possibility of assigning the same number It gives users an approximation of when the order was received

Keeps track of something Classifies information Conceals information Reveals information Requests appropriate action

Human Purposes for Coding

Unicode

Includes all standard language symbols Has room for 65,535 characters

Optical character recognition

Increased speed Eliminates many of the time-consuming and error-fraught steps of other input devices Decentralizes responsibility for quality data directly to the unit that is generating it The transformation of faxes into documents that can be edited

Mark-sense forms

Little training of entry personnel is necessary. A high volume of forms can be processed quickly. Stray marks on form can be entered as incorrect data. Choices are limited to the answers provided. Difficulty in capturing alphanumeric data. Easy to get confused and put a mark in an incorrect position.

Classification Codes

Used to distinguish one group of data with special characteristics from another; Can consist of either a single letter or a number; A shorthand way of describing a person, place, thing, or event; Listed in manuals or posted so that users can locate them easily; Use a single letter for a code

Significant-Digit Subset Codes

Used to help describe a product by virtue of its membership in many subgroups Possible to locate items that belong to a certain group or class Inquiries may be performed on a portion of the code Useful for a marketing product

Alphabetic derivation codes - disadvantages

When the alphabetic portion is small or when the name contains fewer consonants than the code requires Names like ROE—become RXX Some of the data may change

Validating Input

___ Is Important to Ensure that Most Potential Problems with Data Are Eliminated Early