TAILIEUCHUNG - Systems Analysis and Design: Chapter 15 - Designing Accurate Data Entry Procedures

Systems Analysis and Design: Chapter 15 - Designing Accurate Data Entry Procedure's Objectives is Understand the uses of effective coding to support users in accomplishing their tasks; Design effective and efficient data capture approaches for people and systems. | Designing Accurate Data Entry Procedures Systems Analysis and Design, 7e Kendall & Kendall 15 © 2008 Pearson Prentice Hall Learning Objectives Understand the uses of effective coding to support users in accomplishing their tasks Design effective and efficient data capture approaches for people and systems Recognize how to ensure data quality through validation Articulate accuracy advantages of user input on ecommerce Web sites 15- Kendall & Kendall Accurate Data-Entry Objectives Effective coding Efficient data capture Effective data capture Assuring data quality through validation 15- Kendall & Kendall The quality of data input determines the quality of information output. Effective coding – creating meaningful coding for data. Efficient data capture – designing efficient data capture approaches. Effective data capture – assuring complete and effective data capture. Major Topics Effective coding Types of codes Guidelines for coding Validation methods Check digits Ecommerce accuracy 15- Kendall & Kendall Effective Coding Data that are coded require less time to enter Coding helps to reduce the number of items entered Coding can help in sorting of data during the data transformation process Coded data can save valuable memory and storage space 15- Kendall & Kendall Coding – the process of putting ambiguous or cumbersome data into short, easily entered digits or letters. Human Purposes for Coding Keeps track of something Classifies information Conceals information Reveals information Requests appropriate action 15- Kendall & Kendall Specific types of codes allow us to treat data in a particular manner. Keeping Track of Something Simple sequence code Alphabetic derivation codes 15- Kendall & Kendall Sometimes we want to identify a person, place, or thing just to keep track of it. Simple Sequence Codes A number that is assigned to something if it needs to be numbered No relation to the data itself Figure Using a simple sequence code to .

• Cơ sở dữ liệu
• Systems Analysis and Design
• Designing Accurate Data Entry Procedures
• Effective coding
• Human Purposes for Coding
• Simple Sequence Codes
• Classification Codes
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