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