Why need software testing

Two days before, I posted about how my thoughts will change around testing, talked about the AAA model of testing, and how the AAA model is used for testing.

Now the next question came into my mind: if testing is important is ok, but what are the actual and well-defined advantages of testing we have?

I have some thoughts about those advantages, but I can’t describe them in words because I have very unclear thoughts.

Then I decided, let’s make this answer clear. I searched about that and found lots of content created around testing.

The content I found has different-different opinions about testing, but deeply I observed that all the content directly or indirectly indicates the same points, but people have different-different tests and experiences to explain those points.

All the content I found describes the actual thinking on top of product management and software engineering, which is very important to create and maintain the product.

In software engineering, to build the feature or product is not always the task. Software engineering is never about building new ordinary features and products which do not function properly, are not reliable, and do not have enough efficient use cases.

It’s all about achieving maximum functionality, reliability, usability, efficiency, maintainability, and portability of the feature or product.

And the thinking behind testing is to test a feature and product on top of these parameters. And at this point, I have some clear thoughts about testing, so let’s clean those thoughts more.

---

I described many words like functionality, reliability, usability, efficiency, maintainability, and lastly portability, but what the actual meaning of these words is, let’s clear out more.

Functionality

Functionality :- Functionality means whether all the created or implemented functions do their work correctly or not.

All the functions which are built to achieve some level of expected task, give the correct and well-defined output, and using all the output we achieve the expected task, output is defined by this functionality.

Reliability

Reliability :- Reliability means the downtime and failure rate of the software or service tend to be lower.

The software or service must have maximum uptime and minimum failure time so the software or service does its work reliably.

Usability

Usability :- Usability means designing your software in a way where the features of the software are actually usable and have maximum and easy access to the feature.

This thinking leads to improving the GUI of the product or feature.

Efficiency

Efficiency :- Efficiency means using your resources very wisely.

The resources are very expensive, so design your feature or product in a way where your feature or product consumes a minimum amount of resources and gives the best output using the consumed resources.

Maintainability

Maintainability :- Maintainability means the feature or product is maintainable.

If you design your feature or product in a way where maintaining the feature or product is harder or complex, then this will kill the maintainability of the product.

In software engineering, we try to build a feature or product in a way where the maintainability of the feature or product is very high, so later, if we need to make changes, then we can make changes simply.

Portability

Now last is portability :- Portability is all about running your product on various operating systems.

If your product or feature only runs on your operating system, then the portability of your product or feature is very low.

---

So this is all the parameters where the quality of the software depends, and to test all the parameters, you need to test these points.