Functionality (product)

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In materials science, functionality (or range of functions ) is the set of functions with defined properties that are present in a product .


These functions meet the defined requirements. In product design , functionality is one of the most important aspects. In the software requirement , functionality - in addition to changeability / maintainability , usability , efficiency , transferability and reliability - is an essential quality feature .


Sub-goals of the functionality are according to ISO / IEC 9126 (successor ISO 25000):

  • Appropriateness: Suitability of functions for specified tasks, for example task-oriented composition of functions from sub-functions.
  • Security : Ability to prevent unauthorized access, both accidental and deliberate, to programs and data.
  • Interoperability : Ability to interact with given systems.
  • Conformity : Ability of the software product to comply with standards, conventions or legal provisions and similar regulations with regard to functionality.
  • Compliance: Features of software that cause the software to comply with application-specific standards or agreements or legal provisions and similar regulations.
  • Correctness : Delivering the correct or agreed results or effects, for example the required accuracy of calculated values.

Individual evidence

  1. ^ Ulrich Wohlgemuth: Machine Design. Designing industrial products successfully , Diplomica Verlag , 2016 ISBN 978-3-95934-966-6 p. 59 [1]
  2. Christof Ebert: Systematic Requirements Engineering: Determine, specify, analyze and manage requirements . 5th, revised. Edpunkt , Heidelberg 2014, ISBN 3-86490-139-1 , p. 86 .
  3. ^ Helmut Balzert: Textbook of software technology. 1, basic concepts and requirements engineering . 3. Edition. Spectrum, Akad. Verl, Heidelberg 2009, ISBN 3-8274-1705-8 .