ISO IEC 25010 2011 Systems and Software Quality Requirements and Evaluation SQuaRE Quality Model The ISO/IEC 25010:2011 standard provides a framework for evaluating the quality of software products. It is intended for use by anyone involved in the development, acquisition, or evaluation of software, including software developers, software testers, project managers, and quality assurance professionals. The Software Quality Requirements and Evaluation (SQuaRE) Quality Model is a set of international standards developed by the International Organization for Standardization (ISO) for evaluating and managing the quality of software products. The SQuaRE Quality Model is based on the ISO/IEC 25010:2011 standard, which defines a set of quality characteristics and sub-characteristics that can be used to evaluate a software product's quality.

1. ISO/IEC 25010: 2011
Systems and Software Quality
Requirements
and
Evaluation (SQuaRE)
Quality Model
- Simplified Version
Written and compiled by
Mark John Lado
Date: March 7, 2023
- with the help of (AI) Language Model

2. About the author
Mark John Lado was born and raised in the Philippines, where he
developed an early interest in technology and education. He attended
Colegio de San Antonio de Padua, where he earned his Bachelor of
Science in Information System, and began his career as an Information
System Specialist in the education management industry.
Over the years, Mark has honed his expertise in Object-Oriented
Programming (OOP), Teacher Mentoring, Computer Hardware, Software
System Analysis, and Web Development, which has made him a valuable
asset to various educational institutions in the Philippines. His
dedication to education led him to pursue a Master's degree at
Northern Negros State College of Science and Technology, Sagay City,
Philippines, where he is currently studying to further his expertise
in Information Systems.
Mark's ability to mentor teachers on how to use technology effectively
in the classroom has been recognized by his peers and colleagues, and
his diverse skill set and dedication to education make him a valuable
asset to any organization. He has worked with various educational
institutions, including Cebu Technological University, University of
the Visayas - Danao Campus, Colegio de San Antonio de Padua, and
Carmen Christian School Inc.
Aside from his passion for technology and education, Mark is also an
avid artist. He enjoys painting, sketching, and creating digital art,
which he believes helps him think creatively and find innovative
solutions to problems.
Mark's hardworking and creative nature has earned him a well-deserved
reputation as a top-notch Information System Specialist. He continues
to pursue his passion for technology and education, always striving to
stay up-to-date with the latest developments in the field.

3. ISO/IEC 25010: 2011
Systems and Software Quality
Requirements

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March 7, 2023
What is the use of ISO/IEC 25010:2011 Systems?
The ISO/IEC 25010:2011 standard provides a framework for evaluating
the quality of software products. It is intended for use by anyone
involved in the development, acquisition, or evaluation of software,
including software developers, software testers, project managers, and
quality assurance professionals.
The standard is used to define a set of quality characteristics and
sub-characteristics that can be used to evaluate a software product's
quality. By evaluating a software product against these
characteristics, organizations can gain a better understanding of the
strengths and weaknesses of the software and make informed decisions
about its suitability for their needs.
The standard can be used to evaluate software products at different
stages of the software development lifecycle, including during
development, after development, and after deployment. It can also be
used to evaluate commercial off-the-shelf (COTS) software products and
to compare different software products to each other.
Overall, the use of ISO/IEC 25010:2011 helps to ensure that software
products meet the needs and expectations of their intended users, are
reliable and performant, and are easy to use and maintain. It can also
help to identify areas for improvement in existing software products
and inform decisions about future software development and
acquisition.

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March 7, 2023
What is ISO/IEC 25010:2011 Systems?
ISO/IEC 25010:2011 is a standard that specifies a model for evaluating
the quality of software systems. It is also known as the "Software
product Quality Requirements and Evaluation" (SQuaRE) standard. The
standard defines a set of quality characteristics and sub-
characteristics that can be used to evaluate a software product's
quality attributes.
The quality characteristics defined in the standard are:
Functionality: The extent to which the software meets its
specified requirements and performs its intended functions.
Reliability: The ability of the software to maintain its level of
performance under specific conditions for a specified period of
time.
Usability: The ease with which users can interact with the
software to achieve their goals.
Efficiency: The level of resources required by the software to
perform its functions.
Maintainability: The ease with which the software can be
modified, adapted, and corrected.
Portability: The ability of the software to be transferred from
one environment to another.
Each quality characteristic has several sub-characteristics that
provide more detail about the specific aspects of quality that are
relevant to that characteristic.
ISO/IEC 25010:2011 provides a framework for evaluating software
quality, which includes a set of quality models and metrics that can

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be used to measure a software product's quality. By using this
standard, organizations can evaluate software products against
industry-recognized quality standards and make informed decisions
about the quality of the software they are developing or acquiring.
Detailed discussion of each of the six characteristics
defined in ISO/IEC 25010:2011:
Functionality refers to the extent to which the software meets its
specified requirements and performs its intended functions. This
characteristic assesses the ability of the software to provide the
features and capabilities that are necessary to achieve the intended
goals of the user. Examples of sub-characteristics of functionality
include correctness, completeness, and accuracy.
Reliability refers to the ability of the software to maintain its
level of performance under specific conditions for a specified period
of time. This characteristic assesses the software's ability to
perform its intended functions without failure or error. Examples of
sub-characteristics of reliability include fault tolerance,
recoverability, and availability.
Usability refers to the ease with which users can interact with the
software to achieve their goals. This characteristic assesses the
software's ability to provide an intuitive and user-friendly interface
that is easy to navigate and understand. Examples of sub-
characteristics of usability include learnability, efficiency, and
satisfaction.
Efficiency refers to the level of resources required by the software
to perform its functions. This characteristic assesses the software's
ability to perform its intended functions in a timely and resource-
efficient manner. Examples of sub-characteristics of efficiency
include time behavior, resource utilization, and capacity.

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Maintainability refers to the ease with which the software can be
modified, adapted, and corrected. This characteristic assesses the
software's ability to be updated and maintained over time to ensure
its continued relevance and usefulness. Examples of sub-
characteristics of maintainability include modularity, reusability,
and testability.
Portability refers to the ability of the software to be transferred
from one environment to another. This characteristic assesses the
software's ability to operate in different environments and
configurations. Examples of sub-characteristics of portability include
adaptability, installability, and replaceability.
Overall, each of these characteristics is important in assessing the
quality of a software product. By evaluating a software product
against these characteristics and sub-characteristics, organizations
can gain a better understanding of the strengths and weaknesses of the
software and make informed decisions about its suitability for their
needs.

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Evaluation (SQuaRE)
Quality Model

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What is Software Quality Requirements and Evaluation (SQuaRE)
Quality Model?
The Software Quality Requirements and Evaluation (SQuaRE)
Quality Model is a set of international standards developed by
the International Organization for Standardization (ISO) for
evaluating and managing the quality of software products. The
SQuaRE Quality Model is based on the ISO/IEC 25010:2011
standard, which defines a set of quality characteristics and
sub-characteristics that can be used to evaluate a software
product's quality.
The SQuaRE Quality Model includes a set of interrelated
standards that provide a comprehensive framework for evaluating
and managing software quality throughout the software
development lifecycle. The model defines a set of quality
requirements that software products must meet, as well as a set
of evaluation methods and techniques that can be used to assess
the quality of software products.
The SQuaRE Quality Model includes a set of eight quality
characteristics, each of which is divided into several sub-
characteristics. The eight quality characteristics are:
1. Functionality
2. Reliability
3. Usability
4. Efficiency
5. Maintainability
6. Portability
7. Security
8. Compatibility

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Each of these characteristics and sub-characteristics provides a
specific aspect of quality that can be evaluated and managed
throughout the software development lifecycle.
The SQuaRE Quality Model is designed to be flexible and
adaptable, allowing organizations to customize their approach to
software quality evaluation and management based on their
specific needs and requirements. By using the SQuaRE Quality
Model, organizations can ensure that their software products
meet the highest standards of quality and provide the best
possible user experience.
Detailed discussion of the eight quality characteristics defined in
the SQuaRE Quality Model
Functionality: This quality characteristic refers to the ability of
the software to provide the features and capabilities that meet the
specified requirements and user needs. It includes sub-characteristics
such as correctness, completeness, and appropriateness.
Reliability: This quality characteristic refers to the ability of the
software to maintain its level of performance under specific
conditions for a specified period of time. It includes sub-
characteristics such as fault tolerance, recoverability, and
availability.
Usability: This quality characteristic refers to the ease with which
users can interact with the software to achieve their goals. It
includes sub-characteristics such as learnability, efficiency, and
satisfaction.
Efficiency: This quality characteristic refers to the level of
resources required by the software to perform its functions. It
includes sub-characteristics such as time behavior, resource
utilization, and capacity.

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Maintainability: This quality characteristic refers to the ease with
which the software can be modified, adapted, and corrected. It
includes sub-characteristics such as modularity, reusability, and
testability.
Portability: This quality characteristic refers to the ability of the
software to be transferred from one environment to another. It
includes sub-characteristics such as adaptability, installability, and
replaceability.
Security: This quality characteristic refers to the ability of the
software to protect data and prevent unauthorized access or
manipulation. It includes sub-characteristics such as confidentiality,
integrity, and availability.
Compatibility: This quality characteristic refers to the ability of
the software to operate with other software, hardware, and systems. It
includes sub-characteristics such as co-existence, interoperability,
and compliance.
Overall, each of these quality characteristics is important in
evaluating and managing the quality of software products. By assessing
a software product against these characteristics and sub-
characteristics, organizations can identify areas for improvement and
make informed decisions about software development, acquisition, and
deployment.
References:
ISO/IEC 25010:2011 Systems and software engineering - Systems and
software Quality Requirements and Evaluation (SQuaRE) - System and
software quality models. (2011). International Organization for
Standardization. https://www.iso.org/standard/35733.html