Chapter 2 Flashcards
Methodology
A methodology includes detailed steps, common forms and other tools that you might use on any system development process.
SDLC or systems development lifecycle
Is a successful methodology that helps new information systems start out smoothly and is also called the waterfall model
SDLC or waterfall model 5 steps
Planning Analysis Design Implementation Maintenance
Economic feasibility
Attempts to determine if perceived being its outweigh the costs
Schedule feasibility
Tries to determine whether time needed for project is less than or equal to Time allotted
Technical feasibility
Accesses whether the company has the technical expertise required to complete the project
Legal feasibility
To ensure that project complies with applicable laws
Operational feasibility
To determine whether key players will support the project itself and the resulting info system
Project team
Should consist of IS pros and business pros. A unique team as far as skill set is more successful
Goals and scope
Identified in quantifiable measures (10% increase in profit)
Project plan
The final product of the planning phase
It is revised and edited throughout the SDLC
Analysis phase
Purpose is to figure out what the problem is
The understanding of all details of the document is called
Requirements determination
The document of requirements produced by IS pros usually takes the form of complex models like flow charts these are called…
Logical models
Design phase answers how the project will be accomplished
All members of the team select the best possible solution and then physical models should be created
Specific hardware and software is selected to get the job done and specs for custom software are created
Switching from old IS to new IS can be done in 4 ways “going live”
Plunge - turns one system off one day turns the other on the next day
Parallel- runs both systems at the same time until confidence in the new system is established
Phased- breaks project up into sections and implements independently
Pilot- implements the entire project for only part of the company to see how it works before using it all around
Maintenance phase
Fixing bugs and answering questions about the new system
SDLC problems
Scope creep- scope and objectives are not clearly identified in planning phase and therefore creeps into different directions
Partial analysis- the project is not fully analyzed and requirements are incomplete
Analysis paralysis- this occurs when the project is over analyzed and not allowed to continue for fear of omission
SDLC is a time consuming approach
However it ensures that detailed requirements are outlined
RAD is another methodology it combines analysis design and implementation phases
Planning
Analysis design and implementation
Maintenance
Instead of trying to develop logical models the RAD system attempts to develop a….
Prototype
Prototype
A model that more closely resembles the final product than a logical model or physical model
Unified process
Broken into parts then Core objects are analyzed and put together and the extra objects are added afterward. Reduce risk by getting model working as quickly as possible
Extreme programming
Jumps to implementation phase immediately analysis is done when programming cannot proceed. This should only be used for smaller projects
5 basic components of information system
Hardware Software Data Procedures People
