Design Pattern
The short answer · 11 words
In short
Design patterns describe reusable solutions to recurring problems in software design.
Flow-alerta.cab (2026): Design Pattern. https://flow-alerta.cab/en/glossar/design-pattern. Editorially reviewed on: 09 October 2026.
How much detail would you like?
Practical
Relevant for comprehensible, maintainable software; use additional abstraction only for recognizable benefits.
Possible example: A web application informs multiple views of a changed order status using the Observer pattern.
Maintainable web applications, modular ERP extensions and API architectures in IT departments.
At a glance
- Core
- A design pattern explains a problem, the context and a possible structure of the solution, such as Observer or Factory. It is not a finished code and should only be used if it fits the specific problem.
- Use
- Relevant for comprehensible, maintainable software; use additional abstraction only for recognizable benefits.
- Example
- Possible example: A web application informs multiple views of a changed order status using the Observer pattern.
- Limits
- Overengineering: Enforce patterns where simple functions suffice; wrong pattern selection increases complexity.
Questions about this term
Are design patterns language-independent?
Many concepts can be transferred; their concrete implementation and usefulness depend on the language and its functions.
What is an anti-pattern?
A recurring solution approach with adverse consequences.
All details and background
A design pattern explains a problem, the context and a possible structure of the solution, such as Observer or Factory. It is not a finished code and should only be used if it fits the specific problem.
ELI5 – Explained simply
Like proven building plans for architects: you don’t reinvent the wheel for stairs or doors every time.
Why it matters in practice
Relevant for comprehensible, maintainable software; use additional abstraction only for recognizable benefits.
Example
Possible example: A web application informs multiple views of a changed order status using the Observer pattern.
Pitfalls and limits
- Overengineering: Enforce patterns where simple functions suffice; wrong pattern selection increases complexity.
Origin & history
Made famous by the 'Gang of Four' (Gamma, Helm, Johnson, Vlissides, 1994).
Use in mid-sized companies
- Maintainable web applications, modular ERP extensions and API architectures in IT departments.
Related terms
- Clean code
- Software architecture
- OOP
- Refactoring
- Gang of Four
Matching Flow-alerta service
Websites & web applicationsWebsites & Web Applications – Maintainable Software StructureMatching tool / use case
View use casesUse Case: Recurring design problems in a structured web application.Sources
- www.informit.comGamma, Helm, Johnson & Vlissides (veröffentlicht 31.10.1994), Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley
Quellen geprüft am 09.10.2026.
Editorially reviewed on: