Software quality

Why Is the Software Quality So Important?

Clóvis Wichoski
July 15, 2020
Software Quality
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Discover the importance of the choice of a quality model for software and measurement which fits your project to create good applications.

In any context, it is important to do things quickly and saving resources. However, the most crucial characteristic that any product must have is quality. After all, without it, no one will grow interested in what was produced. And this isn’t any different in the development market. This is why software quality exists.

This term basically means that a given application fulfills all the functions it is meant to. In other words, all that was developed and documented must function to completion when tested by users.

However, the aforementioned functioning doesn’t involve solely the basic of what was developed. The software quality also envisions other pertinent traits of the use, such as a good design, reliability, durability, etc.

This indicates that practice is important to assure that a good and flawless product is brought to the market. But, in order for this to happen, it is necessary to adopt a quality model with measurements that gauge the expected results. And it is precisely this topic that will be tackled in this article. Keep on reading and get to know more!

The model of software quality

Before starting to work on something, you need to have some parameters to be able to tell whether the results were satisfactory or not. In the development of applications, this establishing of parameters building is made in accordance to the model of software quality.

From it, the quality engineers are able to define the way applications will be evaluated as they are developed. Furthermore, it also establishes what are the skills demanded from those who will work in the project. And, of course, all of these qualities make the general planning easier.

Currently, three models are widely utilized: McCall’s, Boehm and Dromey’s. The choice between one of these is very important, for the model determines what characteristics and measurements will be the main guidelines to the software quality.

In McCall’s model (created by the American air force in 1977), for example, the main goal is to maintain the harmony between users and developers. Thus, the product is divided in three stages (review, transition and operation), each one with its own specific measurements.

Moving on to the Boehm quality model, created in 1978, the idea is having something hierarchic which is structured according to the main characteristics. So these “key attributes” will form the basis of the software quality, dividing themselves into small measurements and factors.

Lastly, Dromey’s quality model focuses on attributes and lower attributes, connecting properties of the application to set measurements. Therefore, it is also focused on “key attributes”, but they will always be linked to specific characteristics of the software.

Main measurements to gauge the quality of the software

After choosing the quality model, it is necessary to establish measurements that gauge the results reached by the development team. After all, it is they that will indicate if the team is following the right track or if any stage must go back some steps to avoid future problems.

Here we will talk about the most important ones, but it is worthy to highlight that they won’t fit every project. The reason being that each one of them has its specific need. Thus, the manager must pick the measurements which make the most sense to their own reality.

Defect Density

This measurement reveals how many problems were found and solved during a given period. Logically, the greater the number of problems, the worse the development and the software quality. And in case this number is really high, it is important to conduct some analysis to figure the reason why that is happening.

Defect Removal Efficiency

This measurement indicates how efficient the team is in solving detected problems. And, of course, it is important for all of them to be removed. But if that doesn’t happen, the quality team must investigate the reasons anyway.

Meantime Between Failures

It is practically impossible to produce an application that never fails, but we can estimate the time for that to happen. Therefore, the software quality must observe this measurement to reduce this time gap in between fails, making sure it is as short and acceptable as possible.

Application Crash Rate

Especially important to mobile applications and websites, this measurement reveals the frequency in which a software presents fatal problems. It should be noticed that it is really important, because it indicates the quality of the code. All things considered, the better it is, the longest the application will remain active.

Software quality is essential to any project and leaving it aside can result in the release of a product which doesn’t meet the needs of the user. Therefore, pick a good quality model during the planning and don’t forget to measure the results periodically.

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Clóvis Wichoski

Clóvis Wichoski

CEO Mapperidea
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