Exam summary - Specification: the degree of understanding, com...

REQUIREMENTS

ENGINEERING

Exam summary

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12-12-2024 1 / 2

2 Pohl - Three dimensions Specification: the degree of understanding, complete specification means that requirements are unambiguous and verifiable.

The representation of requirements can be divided into three stages:

• Informal, natural language

representation. These are easy to read but less concrete.

• Semi-formal, some more abstract

models like class diagrams. These provide a good overview, but its quality heavily depends on semantics (choice of words).

• Formal, first-order logic. These are

precise but technical and difficult to interpret.

Agreement: the degree in which analysts and stakeholders are on the same wavelength in term of the solution and shared terminology.

Systems RE is concerned with the machine’s effect on the surrounding world and the assumptions made about that world. This means RE encompasses both world phenomena and shared phenomena.

System: a set of components interacting with each other to satisfy some global objectives.Within RE there is always a system-as-is, which exists before the system-to-be is built. This

system-to-be consist of two sub-components:

• Software-to-be, the software solution to be built • Environment, people (with roles in processes), hardware-and software architecture

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