IS Development

Yong Choi

School of Business

CSU, Bakersfield

Study Objectives IS A&D Methodology Alternative IS Conversion Strategy Implementation Issues Measuring IS Success

IS A & D Methodology

Systems development life cycle (SDLC) Prototyping Outsourcing

• Application Software Packages

Object Orientation

Systems Development Life Cycle (SDLC) The oldest methodology Very formal Partitions the systems development process

into distinct stages. Develop system sequentially (stage by stage).

Pros and Cons of SDLC

Suitable if domain is well structured Online TPS

Not appropriate if domain is semi- or unstructured

Prototyping

Building of an experimental system quickly and inexpensively End users can have a chance to evaluate

systems Less formal than SDLC

Pros and Cons of Prototyping

Suitable if domain is semi- or unstructured Various DSS

Useful if technical requirements are unclear. Not appropriate for large and complex

technical systems - large TPS Design problem due to rapid development

Outsourcing

It is the process of turning over an organization's computer operations, telecommunications network, or application development to external vendors.

When to use outsourcing

Existing capabilities are limited – short of technological ability and IS staff

Systems that do not related with organization's secret (competitiveness)

Save costs To learn about more advanced technologies

Pros of outsourcing

Economy Can reduce application development and

implementation time and cost Service quality Predictability

Cons of outsourcing

Loss of control Vulnerability of strategic information Dependency

Application Software Packages

One of the outsourcing methods Ready-to-use software

a set of prewritten, predesigned, pretested information systems

ERP systems

Object-Oriented A&D

New way to develop systems Very relevant to the Internet environment Time and cost effective method Developers OOAD knowledge Object library Still evolving