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System Requirements Specification SRS - Coggle Diagram
System Requirements Specification SRS
Why
Definition of all functional and non functional requirements and specifications over the whole lifetime for the system and the processes related to the system
RQ for DEv.
RQ for Technical Doc
RQ for Customer Support
Subsitute the system document
Subsitutes the "Pflichtenheft"
One source for all system relevant specifications
Changeable
I know where to search information
I have to change just 1 document
What
Thing shall be defined, which are already fixed (already defined or a dedicated solution is not allowed)
Things shall be defined, which are directly related to >1 subsystems and/or components (e.g. interfaces)
Refined requirements are technical solutions for abstract requirements (eg safety goal to fsr and tsr)
refinement needed
What not
Things shall not be defined, if they are open for development (not fixed)
Component and subsystem Requirements
Except the RQ are defined by customer, KE, technical needs or regulations and standards
Exception: if they are not open for design (e.g. module and cells are fixed for a project)
Everything what is in CAD or similar drawing. Except Interfaces.
How
use template
attributtes for each RQ
Analyse each RQ
Usable during the Operation and Maintenance Phase
Traceable
Modifiable
Consistent
Verifiable
Complete
Unambiguous and Comprehensible
8 Atomic?
Essential / Needed
10 Aligned (w. .dept. and customers)
Starting Point
MAV proposal for quality criteria of RQs (eingearbeitet SPM)
Unambiguous
Complete
Comprehensible
Aligned
Essential
Measurable
Separation Requirement and Specification needed