Chapter 9

Chapter 9

SDLC: NI and Organizational Decision Making

​Objectives

​•Describe the systems development life cycle (SDLC).

•Explore selected approaches to SDLC.

•Assess interoperability and its importance in addressing and meeting the challenges of implementing the HITECH Act in health care.

•Reflect on the past to move forward into the future to determine how new systems will be developed, integrated, and made interoperable in health care.

​Systems Development Life Cycle

​•SDLC is a way to deliver efficient and effective information systems that fit with the strategic business plan of an organization.

Waterfall Model

• ​One of the oldest methods

• Output from one phase flows into or becomes the initial input for the next phase.

• ​Sequential, mimics a waterfall

• ​Six phases

• ​https://youtu.be/XCNBqDDc3K0

Waterfall Model

• ​One of the oldest methods

• Output from one phase flows into or becomes the initial input for the next phase.

• ​Sequential, mimics a waterfall

• ​Six phases

• ​https://youtu.be/XCNBqDDc3K0

​Rapid Prototyping/Rapid Application Development (RAD)

​•Provides a fast way to add functionality through prototyping and user testing rather than documentation

Object-Oriented Systems Development (OOSD)

•Blends the logic of the SDLC with the power of object-oriented modeling and programming (which attempts to represent real-world objects)

•Once the system is object oriented, all of the interactions or exchanges take place between the objects.

Dynamic System Development Method (DSDM)

•Highly iterative and incremental approach with a high level of user input and involvement

•Iterative process=repetitive examination=enhanced detail & improved accuracy

•Three phases:

−Preproject (stakeholders/funding)

−Project life cycle (5 steps)

-Postproject (verify system is functioning)

Computer-Aided Software Engineering Tools

•Automate many tasks required in a systems development effort

•Encourage adherence to the SDLC

•Provides standardization and thoroughness

•These tools help to reduce cost and development time while enriching the quality of the product.

Open Source Software (OSS)

•With OSS, any programmer can implement, modify, apply, reconstruct, and restructure the rich libraries of source codes available from proven, well-tested products.

Interoperability

•The ability to share information across organizations will remain paramount under the HITECH Act.

•The ability to share patient data is extremely important, both within an organization and across organizational boundaries.