Dr. Andy Seddon Staffordshire UNIVERSITY School of Computing SSADM S tructured S ystems A nalysis...
7
Dr. Andy Seddon Staffordshire UNIVERSITY School of Computing SSADM Structured Systems Analysis and Design Method
-
Upload
grace-greer -
Category
Documents
-
view
214 -
download
2
description
Dr. Andy Seddon Staffordshire UNIVERSITY School of Computing Purpose of SSADM l improved project planning and control l more effective use of experienced and inexperienced staff l better quality systems l resilience to loss of key staff l supportable by computer based tools l good communication between developers and end users
Transcript of Dr. Andy Seddon Staffordshire UNIVERSITY School of Computing SSADM S tructured S ystems A nalysis...
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
SSADM
Structured Systems Analysis and Design Method
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
History of SSADM
Original version 1981 - developed from LSDM Selected by the former Central Computer and
Telecommunications Agency (CCTA) – now part of the Office of Government Commerce (OGC)
Supported by the National Computing Centre (NCC) and other organisations
Title is Crown Copyright but anyone is entitled to use methodology free of charge
Now in Version 4+
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
Purpose of SSADM
improved project planning and control more effective use of experienced and
inexperienced staff better quality systems resilience to loss of key staff supportable by computer based tools good communication between
developers and end users
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
Main Features of SSADM
A government standard Data driven Logical and physical views of the system Utilises differing views of the system Requires user involvement Top-down and bottom-up techniques Diagrammatic and non-diagrammatic techniques Links to quality assurance, project management,
risk assessment and other project procedures
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
Modules and Stages of SSADMStage 0
Feasibility
Feasibility Study Module
Stage 1Investigatecurrent environment
Stage 2Business system options
Requirements Analysis Module
Stage 3Definition of requirements
Requirements Specification Module
Stage 4Technical system options
Stage 5Logical design
Logical System Specification Module
Stage 6Physical design
Physical Design Module
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
Diagrammatic Techniques
Logical data modelling Data flow modelling Entity/event modelling
(Entity life history and Effect correspondence diagramming)
Enquiry access paths I/O structuring Dialogue design Logical database process design
Dr. Andy Seddon
StaffordshireUNIVERSITY
Schoolof
Computing
Non-diagrammatic Techniques
Relational data analysis Requirements definition Function definition Formulation of options Specification prototyping
