Ch 8 - Systems Development

DFDs

________: describe the activities that fulfils a business relationship or accomplish a business task.

Software

________: Can be purchased from external vendors or developed in house.

OOSD (object oriented)

________: identifies potential problems and opportunities.

Critical path

________: activities that, if delayed, would delay the entire project.

Requirements analysis

________: determines user, stakeholder, and organisational needs.

Data modelling

________: accomplished through the use of entity- relationship (ER) diagram.

Environmental design

________: Involves systems development efforts that slash power consumption and take less physical space.

Systems operation

________: The use of a new or modified system.

**Development team** 

• Determines objectives of the information system

• Delivers system that meets objectives

**Project** 

Planned collection of activities that archives a goal

**Stakeholders**

People who benefit from a project 

**Users** 

People who interact regularly with the system

**Systems** **analyst**

Professional who specialises in analysing and designing business systems 

**Programmer**

Responsible for modifying or developing programs to satisfy user requirements

**Individual systems developer**

person who performs all of the systems development roles

**Individual users**

acquire applications for both personal and professional use 

**End-user** **systems** **development**

describes any systems development project in which business managers and assume the primary effort 

**Prototyping** 

An iterative approach

**Outsourcing and on-demand computing**

Reasons for using outsourcing and on-demand computing approaches 

**Managing change**

essential to recognise and deal with existing or potential problems

**Object-oriented systems development**

Combines logic of systems development life cycle with power of object-oriented modelling and programming 

**Data modelling**

accomplished through the use of entity-relationship (ER) diagram

**IS vendor**

Company that offers hardware, software, telecommunications systems, databases, IS personnel, or other computer-related resources

Individual systems developer

person who performs all of the systems development roles

Individual users

acquire applications for both personal and professional use

End-user systems development

describes any systems development project in which business managers and assume the primary effort

Information systems planning

translating strategic and organisational goals info systems development initiatives

Aligning goals and IS goals

critical for successful systems development effort

Systems investigation

identifies problems and identities and considers them in a light of business goals

Systems analysis

studies existing systems and work processes to identify strengths, weaknesses, and opportunities for improvement

Systems design

defines how the information system will do what it must to obtain the problems solution

Systems implementation

creates or acquires various system components details in systems design, assembles them, and places new or modified system info operation

Systems maintenance and review

ensures the system operates as intended

Rapid application development (RAD)

employs tools, techniques, and methodologies designed to speed application development

Managing change

essential to recognise and deal with existing or potential problems

Project schedule

detailed description of what is to be done

Project milestone

critical date for completion of a major part of the project

Project deadline

date the entire project is set to be completed and operational

DFDs

describe the activities that fulfils a business relationship or accomplish a business task

Logical design

describes functional requirements of a system

Physical design

specifies the characteristics of the system components necessary to put the logical design into action

Purpose of systems design

To prepare the detailed design needs for a new system or modifications to an existing system

Purpose of systems implementation

To install a system and make everything, including users, ready for its operation

IS vendor

Company that offers hardware, software, telecommunications systems, databases, IS personnel, or other computer-related resources

Software

Can be purchased from external vendors or developed in house

Systems operation

The use of a new or modified system