SDLC
System development life cycle
There are two types of SDLC the 4 stage and the 6 stage
Note that in the six stage SDLC some of the steps fit into the four stage
4 stage
1.Plan
2.Design
3.Development
4.Implement
6 stage
1.Prelimenary investigation
1.Analysis
Design
Development
4.Implementation
4.Maintainance
A system has an SDLC which uses different methodologies such as waterfall, rad, prototype or o-o, it is made in three phases
Phase one – The initial investagation
- Feasibility study
- Estimate
- Roles/ organisation chart
- Scope
- Recommendations
Phase two – Requirement modelling
- Data flow diagram (DFD)
- o-o Modelling (using the case diagram)
Phase three – Design
- System design specification