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IT Systems in an Organisation (Waterfall Development Method (When the…
IT Systems in an Organisation
Waterfall Development Method
When the whole project is created and then sent to the client.
ADV
Highly Structured
Good for Smaller Project
DIS
If any problem, developers will have to redo the whole software again
If structure and planning is not done properly, the whole project is bound to fail
Not a good model for complex projects
Agile Development Model
Project is broken down to smaller parts and then after each step, you follow through with the System Life Cycle.
ADV
Client is aware of how the System is developing; Working Software is sent over frequently
Changes can me made with little to no issue
High Level of Interaction
DIS
Lack of Initial Goal
Developers might not have a whole project overview
If client isn't too sure, then project can be set off track
SSADM (Structured System Analysis & Design Model
Methodology that focuses on the Analysis & Design Stage.
Waterfall method
Stage 0
Feasibility Study
Cost
Hardware & Software
Existing Organisation Software
Stage 1
Investigations of Current Software / Environment
Create Context Diagram of current software (DFD & ERD)
List if Users & Interaction
Problems with current system
Opportunities & Ideas
Stage 2
Business System Options
Analyst analyses different set of options for the client
(Either continuing with same software; Cost / Benefit Analysis of Proposed Plan; Examining Negative Impacts of System
Stage 3
Requirement Specifications
DFD & ERD Diagrams are created to represent new System
User roles are identified
Stage 4
Technical System Options (TSO)
Considers Hardware, Software, Networks & Personnel required for proposed system.
Several things might be suggested, and it might be rejected
Stage 5
Logical Design
Identifying, Modelling & Documenting required diagrams & data flow charts.
Stage 6
Physical Design Stage
Specify the Physical Data & Process Design
PMBoK (Project Management Body of Knowlegde
Covers Integration, Scope, Time, Cost, HR, Communications & Quality Management
AVD
All round Guidance
Step-b-Step process on managing projects
DIS
No guidance on team responsibilities