Information System - ANS-interrelated components working together to collect, process,
and store info the support decision making
Why do we need a formal process of analyzing/designing a system? - ANS-1. minimize
failure
2. avoid creating an intuition-based system
3. avoid late, over-budgeted projects
4. deliver values as promised
Top 2 reasons for IT project failures (50-70%) - ANS-1. Lack of complete requirements
2. Lack of user involvement
SDLC stands for - ANS-Systems Development Life Cycle
Planning - ANS-WHY: identifying opportunities, analyzing feasibility, developing a work
plan
Analysis - ANS-WHO: develop analysis strategies, determine business requirements,
create use cases, model data
Design - ANS-HOW: How to accomplish the system's objective: design the physical
system...architecture/interfaces/program
Implementation - ANS-construct, install, support plan
What drives the business requirement? - ANS-the business need
, Systems Analyst - ANS-IT consultant who analyzes the SDLC/IS issues
System analyst skills - ANS-interpersonal, business, technical, analytical, management,
ethical
Similar positions to system analyst - ANS-business, infrastructure, requirement, change
management analysts
Methodology - ANS-formalized approach to implementing the SDLC
Categories of methodologies - ANS-1. Waterfall
2. Rapid App Development
3. Agile
Waterfall methodology - ANS-strictly sequential
Waterfall strengths - ANS-1. requirements are defined long before programming begins
2. requirement changes are limited as the project progresses
waterfall weaknesses - ANS-1. must wait a while before you see visible changes
2. long time start to finish
3. requirements overlooked at the beginning, tough to change
variants of waterfall - ANS-1. parallel
2. v-model
parallel - ANS-reduces project time and need for rework (split stages), but creates
subproject that may be difficult to integrate at the end
V-model - ANS-quality improves and there's an emphasis on testing, but it is rigid (for
zero errors) and testing is done all the time
Rapid App Development - ANS-Different versions are made:
1. planning
2. Analysis > Design >implementation
3. system prototype
4. implementation
3 variants of RAD - ANS-1. iterative development
2. system prototyping
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