Systems Development Life Cycle (SDLC)

a methodology for understanding the business objectives of any system and designing an appropriate solution

capabilities you want your site to have

System functionalities

types of information systems capabilities you will need to achieve you business objectives

Information Requirements

the information elements that the system must produce in order to achieve the business objectives

System Design Specification

description of the main components in a system and their relationship to one another

describes the flow of information at your e-commerce site, the processing functions that must be performed, the databases that will be used, the security and emergency backup & the controls that will be used in the system

translates the logical design into phsical components

hiring an outside vendor to provide the services you cannot perform with in-house personel

when a firm purchases or leases a Web server (and has total control over its operation) but locates the server in a vendors physical facility. The vendor maintains the facility, communications lines, and the machinery

involves testing the site's program modules one at a time

involves testing the site as a whole, in a way the typical user will use the site

verifies that the business objectives of the system as originally conceived are in fact working

a process in which the site is compared with those of competitors in terms of response speed, quality of layout, and design

the arrangement of software, machinery, and tasks in an information system needed to achieve a specific functionality

Two-Tier Architecture

e-commerce system architecture in which a Web server responds to requests for Web pages and a database server provides backend data storage

Multi-tier architecture

e-commerce system architecture in which the Web server is linked to a middle-tier layer that typically includes a series of application servers that perform specific tasks as well as to a backend layer of existing corporate systems

Site management tools

verify that links on pages are still valid and also identify orphan files

Dynamic page generation

the contents of a Web page are stored as objects in a database, rather than being hard-coded in HTML. When the user requests a Web page, the contents for that page are then fetched from the database.

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Test 2 - E-Commerce

Term	Definition
Systems Development Life Cycle (SDLC)	a methodology for understanding the business objectives of any system and designing an appropriate solution
Business Objectives	capabilities you want your site to have
System functionalities	types of information systems capabilities you will need to achieve you business objectives
Information Requirements	the information elements that the system must produce in order to achieve the business objectives
System Design Specification	description of the main components in a system and their relationship to one another
Logical Design	describes the flow of information at your e-commerce site, the processing functions that must be performed, the databases that will be used, the security and emergency backup & the controls that will be used in the system
Physical design	translates the logical design into phsical components
Outsourcing	hiring an outside vendor to provide the services you cannot perform with in-house personel
Co-location	when a firm purchases or leases a Web server (and has total control over its operation) but locates the server in a vendors physical facility. The vendor maintains the facility, communications lines, and the machinery
Unit Testing	involves testing the site's program modules one at a time
System testing	involves testing the site as a whole, in a way the typical user will use the site
Acceptance testing	verifies that the business objectives of the system as originally conceived are in fact working
Benchmarking	a process in which the site is compared with those of competitors in terms of response speed, quality of layout, and design
System architecture	the arrangement of software, machinery, and tasks in an information system needed to achieve a specific functionality
Two-Tier Architecture	e-commerce system architecture in which a Web server responds to requests for Web pages and a database server provides backend data storage
Multi-tier architecture	e-commerce system architecture in which the Web server is linked to a middle-tier layer that typically includes a series of application servers that perform specific tasks as well as to a backend layer of existing corporate systems
Site management tools	verify that links on pages are still valid and also identify orphan files
Dynamic page generation	the contents of a Web page are stored as objects in a database, rather than being hard-coded in HTML. When the user requests a Web page, the contents for that page are then fetched from the database.

Created by: cwhitt

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