SSADM
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Structured Systems Analysis and Design Methodology
Structured Systems Analysis and Design Methodology (also commonly known as SSADM) is a method used for analysis and design of system development. The method was launched in 1981 and is open standard.
Introduction
SSADM is a waterfall method, which means that the method consists of stages. You can only go on to the next stage if the previous one is finished. Methods such as these are typically made to make the development of software easier, faster and more effective (and costing less money). SSADM was launched in 1981 and was produced for an office of the UK government, additionally the method is open standard.
Stages
The stages mentioned previously consist of many substages, only the main stages are mentioned here:
- Feasability
- Requirements analysis
- Requirements specification
- Logical system specification
- Physical Design
- Data Flow Modeling
- Logical Data Modeling
- Entity Behavior Modeling
The current situation is analyzed and any possible problems are noted.
The existing environment is analyzed as well as the system requirements. Directly following this, business options are presented and one option is selected.
The business option from stage 2 is finally selected and scope and funtionality are described.
A feasible option is chosen. Final development will be based upon this choice.
Physical data is specified and the process is designed
Techniques
There are three main techniques used in SSADM.
Data is indentified and modeled.
Data requirements are identified and modeled.
Modeling of events that effect each entity.
Sources
http://www.comp.glam.ac.uk/pages/staff/tdhutchings/chapter4.html#head2
http://www.webopedia.com/TERM/S/SSADM.html