Chapter 10. Information Systems. Presentation Overview. The Role of an Information System Information Systems Classified by Function Considerations for Planning and Updating Information Systems Factors to Consider When Choosing a New Information System
Compared to pre-computer information systems, computer-based IS systems offer
measurabilityThe Role of an Information System
Data modeling provides a simulation of a real-world situation built into a software application.
Expert systems make recommendations after posing questions to the user.
Online analytical processing (OLAP) defines and clarifies methods of handling what-if questions posed to large databases.Information Systems Classified by Function
Computer-aided manufacturing (CAM) involves direct use of computers to manufacture products.
Computer-integrated manufacturing (CIM) connects every department in a business, making information available to anyone who needs it.
Statistical quality control (SQC) tracks quality measurements of final product and compares them to conditions throughout manufacturing process.Information Systems Classified by Function
expanded technical staff
increased information technology costs
increased profit margins
enhanced product quality
reduced clerical staff
temporary disruptionConsiderations for Planning and Updating Information Systems
user interface design
open versus closed system
niche information system
system supportFactors to Consider When Choosing a New Information System
Interface design should be user-friendly and intuitive
Critical information should be readily apparentFactors to Consider When Choosing a New Information System
open system – company’s IT staff can alter system or hire third party to make alterations
closed system – must be serviced and supported by vendorFactors to Consider When Choosing a New Information System
exists to serve specially focused sets of customers
includes all needed forms and templates
does not need a lot of technical know-how or staff trainingFactors to Consider When Choosing a New Information System
contains everything a company needs to know to get system up and running
heavily customized and includes support people to tailor system to exact needs of a businessFactors to Consider When Choosing a New Information System
Are installation, staff training, and on-site service and repair included in the system package?
If not, what are the cost of these services?Factors to Consider When Choosing a New Information System
A functional specification document is written first and states exactly what information system must accomplish.
A design specification describes how the goals in the functional specification will be reached.The Process of Developing a New Information System
A prototype is a miniprogram that demonstrates the user interface and functionality of the system.
Development is where the software programming is done and technicians ensure the new hardware works.
Hardware and software purchasing is done and delivered before system can be installed and considered up and running.The Process of Developing a New Information System
Beta testing is where the system is rigorously tested before it is completely trusted to function as designed.
User training normally takes place at same time as beta testing.
The committee or executive overseeing purchase of the system inspects, tests, and approves it.The Process of Developing a New Information System
A support contract allows users to contact systems integrator for technical support, training, and on-site troubleshooting.
If system designed in-house, responsible department often operates as an independent entity.The Process of Developing a New Information System
Based on the information presented in this chapter and your own experience, what do you think is on the horizon?