The ISO/IEC 25010:2011 standard, part of the SQuaRE series, superseded the older ISO/IEC 9126 standard for software product quality. The new model redefined some characteristics and added two new top-level ones: Security and Compatibility. While "Integration" is a crucial concept, it is defined within ISO/IEC 25010 as a sub-characteristic of Compatibility, alongside Interoperability. Therefore, Integration itself was not one of the main characteristics added to the model, making it the correct answer to the question of which option was not part of the top-level additions.

A. Compatibility was explicitly added as a new main characteristic in ISO/IEC 25010 to address how a product can exchange information and perform its functions while sharing the same environment or resources.

B. Security was the other new main characteristic introduced in ISO/IEC 25010, elevating its importance from being a sub-characteristic of Functionality in the previous standard.

1. OutSystems Official Documentation. Designing the architecture of your OutSystems applications

Version 1.1

March 2019. Page 11

Section "Non-functional requirements

" lists the eight quality characteristics from ISO/IEC 25010

explicitly including Security and Compatibility.

2. International Organization for Standardization (ISO). ISO/IEC 25010:2011 - Systems and software engineering — Systems and software Quality Requirements and Evaluation (SQuaRE) — System and software quality models. The standard's official abstract and scope define the eight product quality characteristics

which are: functional suitability

performance efficiency

compatibility

usability

reliability

security

maintainability

and portability. This confirms the addition of Security and Compatibility compared to its predecessor.

3. Al-Qutaish

R. E. (2010). Quality Models in Software Engineering Literature: An Analytical and Comparative Study. Journal of American Science

6(3). This academic paper analyzes the evolution of software quality models

detailing the transition from ISO 9126's six characteristics to the eight in the then-emerging ISO 25010 standard

highlighting the promotion and addition of Security and Compatibility. (Note: This paper discusses the draft standard

which was later formally published as ISO/IEC 25010:2011 with the same characteristics).