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Certified Profes­sional for Software Architecture (CPSA®)

The CPSA® Advanced Level Module FUNAR – iSAQB® Training Course in Functional Software Architecture


Functional Software Architecture

What’s the most effective way to decouple the compo­nents of your architecture, and build powerful and flexible models at the same time? Functional Architecture does all of that and more with the help of immutable data, combi­nators, and powerful math-based abstractions.

Credit Points for FUNAR Training Courses

Techno­logical Competence


Methodical Compe­tence


Commu­nicative Competence



CPSA Advanced Level module FUNAR diagram curriculum content

Content of the module Functional Software Architecture (FUNAR)


System structure




Imple­men­tation of functional requirements


Imple­men­tation of non-functional requirements


Architectural patterns



How to design architecture with functions, immutable data, and combinators

The module presents functional software architecture as an alter­native to object-oriented architecture. Compared to OO architecture, functional software architecture relies on immutable data, algebraic abstrac­tions, and embedded domain-specific languages. The result are flexible and robust archi­tec­tures that are less complex and have fewer hidden depen­dencies than OO.

Unlike OO archi­tec­tures, FP archi­tec­tures are entirely code. This module therefore illus­trates all architectural principles with concrete code, making them easier to learn.

After completion of the module, partic­i­pants will know the essential principles of functional architecture and will be able to apply them when designing software systems. They will know the peculiar­ities of functional programming languages and can use them effec­tively when imple­menting software systems. They can convert domain knowledge directly into executable code and system­at­i­cally use this to develop algebraic abstractions.

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Wittgen­stein wrote, “The limits of my language mean the limits of my world.” Moritz Nähr, Public domain, via Wikimedia Commons And functional architecture works best with functional programming languages. Functional Software Architecture (“FUNAR”) is one of the most advanced curricula in the iSAQB Advanced canon. It’s about the specific techniques for domain modelling and struc­turing software…

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Advanced Level – Sample task for the CPSA‑A exami­nation task

Sample task “BigSpender” / Topic – Information System

Deutsche Version [pdf]

English Version [pdf]

Curriculum Module FUNAR – Functional Software Architecture

Curriculum of the Advanced Level Module FUNAR with all learning goals and terms for the individual chapters.

English Version [pdf]

Deutsche Version [pdf]

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