Structured Systems Analysis and Design Method

Structured Systems Analysis and Design Method (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:

• Feasibility
The current situation is analyzed and any possible problems are noted.
• Requirements analysis
The existing environment is analyzed as well as the system requirements. Directly following this, business options are presented and one option is selected.
• Requirements specification
The business option from stage 2 is finally selected and scope and funtionality are described.
• Logical system specification
A feasible option is chosen. Final development will be based upon this choice.
• Physical Design
Physical data is specified and the process is designed

Techniques

---

There are three main techniques used in SSADM.

• Data Flow Modeling
Data is indentified and modeled.
• Logical Data Modeling
Data requirements are identified and modeled.
• Entity Behavior Modeling
Modeling of events that affect each entity.

See also

---

• DSDM
• Rapid Application Development (RAD)
• Agile method
• Agile Alliance
• Software Engineering
• Rational Unified Process (RUP)
• Extreme Programming (XP)
• PRINCE2
• Scrum
• Iterative and Incremental Development
• MoSCoW Method
• Pareto Principle (80/20 rule)

Sources

---

http://www.comp.glam.ac.uk/pages/staff/tdhutchings/chapter4.html#head2

http://www.webopedia.com/TERM/S/SSADM.html

Software development