What Software Quality (Really) Is and the Metrics You Can Use to Measure It

 With fast release time and more frequent releases, it's easy to see how the quality of the software can suffer - pressure to release faster, in theory, increasing the chances of polluting production defects. However, this is not the case - a high-performance IT company that is most often released software tends to fail 60 times less.

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You might have taken steps to speed up the release of the software with DEVOPS or Agile Methodology, but you also have to understand what the quality of the software is needed if you want to release high-quality software regularly. It's not good just speeding up development - quality must be at the forefront of your destination.

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When you finish reading this post, you will have a more complete understanding of the quality of the software, the main factors that contribute to quality, and how accurately measure the quality of all your company software specifically develops with the help of test metrics (see Sealights' metric test The learning section for the recommended metric list) is wider).

What is the quality of the software?

Software quality steps whether the software meets the requirements. Software requirements are classified as functional or non-functional.

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Functional requirements determine what the software must do. Functional requirements can be in the form of calculations, technical details, manipulation and data processing, or other specific functions that define what the application intended.

Non-functional requirements determine how the system must work. Also known as "Quality Attributes" non-functional requirements include things such as disaster recovery, portability, privacy, security, support, and usability.

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Some factors contribute to the quality of the software. We will see important aspects of software quality and some practical ways to measure it so you can ensure that every part of the code you use in production meets the requirements.

Note that most factors show software quality in accordance with the category of non-functional requirements. And, while it is clearly important that the software does what is built to do, this is the minimum you expect from any application. Let's see what is needed to aim higher.

Aspects and quality factors

The CISQ software quality model provides a good base for understanding the quality of the software. You can combine the quality aspects described in this model with other relevant factors to get a holistic view of the quality of the software.

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CISQ software quality model

Reliability

Performance efficiency.

Security

Maintenance

Reliability is the risk of software failure and the stability of a program when exposed to unexpected conditions. 

Performance efficiency refers to the use of application resources and how it affects scalability, customer satisfaction, and response time. 

Security assesses how well the application protects information on the risk of software violations. The quantity and severity of the vulnerability found in the software system are indicators of security levels. The weakness of coding and poor architecture often causes software vulnerabilities.

Maintenance is the convenience that you can modify software, adjust it to other purposes, or transfer it from one development team to another. Compliance with software architecture rules and the use of coding that is consistent in all applications joining to make software can be maintained.

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Additional aspects and factors

The CISQ model provides a good platform to understand the quality of the software, but you can consider other aspects with CISQ to get a more holistic quality display.