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What is STLC? Learn Software Testing Life Cycle Phases

Do you know that in 2015 a software testing failure caused a military aircraft Airbus A400M to crash? Sounds unbelievable right? But it's not. This is just one example of a software testing failure. If we decide to take a walk down the lanes of history, there are so many examples to learn the importance of software testing. It may sound like a formality, but it’s not. Quality assurance is the factor that helps you in assuring that your programming product. This aircraft crash incident of 2015 led to the world realizing the importance of testing even more. Software testing life cycle contains a list of many steps. It is not a one-step process.

Today, we will give you a brief tutorial on the life cycle of software testing. Sit tight as the journey might be a little elaborate. The blog covers the following segments-

Phases of Software Testing Life Cycle

Here are the phases that are involved in a typical software testing lifecycle. Go through them in the same order as they are listed in. You cannot skip one phase and go on to the other.

Phases of Software Testing Life Cycle

The Analysis of Test Requirement:

Prerequisite Analysis is, without a doubt the underlying stage in Software Testing Life Cycle (STLC). In this movement Quality Assurance (QA) bunch grasps the essential concerning what we will testing and comprehend the testable necessities. In case any conflict, missing or not saw any essential, by then QA gathering make up for lost time with the various accomplices like Business Analyst, System Architecture, Client, Technical Manager/Lead, etc to all the more probable appreciate the detail data of the need.

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From total starting advance, QA drew in with the where STLC which hinders the bringing forsakes into Software under test. The necessities can be either Functional or Non-Functional like Performance, Security testing. Moreover, essential and Automation reachability of the endeavor should be conceivable in this stage (if material)

Planning of Strategy for the test:

Planning of test use case is the most significant period of Software testing life cycle where all testing procedure is characterized. This stage likewise called as Test Strategy stage. In this stage normally Test Manager (or Test Lead dependent on organization to organization) required to decide the exertion and cost gauges for the whole venture. This stage will be commenced once the necessity social occasion stage is finished and dependent on the prerequisite examination, start setting up the Test Plan. The Result of Test Planning stage will be Test Plan or Test methodology and Testing Effort estimation reports. When test arranging stage is finished the QA group can begin with experiments improvement movement.

Development of the Case of Test:

The advancement movement of the test case is begun once the test arranging action is done. This is the period of STLC where testing group records the itemized experiments. Alongside experiments testing group additionally set up the test information if any required for testing. When the experiments are prepared, then these experiments are audited by companion individuals or QA lead.

Read: Top 120+ QA Testing Interview Questions and Answers for year 2022

Additionally, the Requirement Traceability Matrix (RTM) is readied. The Requirement Traceability Matrix is an industry-acknowledged organization for following prerequisites where each experiment is mapped with the necessity.

Setting up the Right Environment:

Setting up the test condition is an essential piece of the STLC. Essentially test condition settles on which conditions programming is tried. This is free action and can be begun parallel with Test Case Development. In the procedure of setting up a testing condition test group isn't associated with it. In light of the organization to the organization might be a designer or client makes the testing condition. Meanwhile, the testing group ought to set up the smoke experiments to check the preparation of the test condition arrangement.

Executing all of the above:

When the arrangement of Test Case Development and Test Environment arrangement is finished at that point test execution stage can be commenced. In this stage, the testing group starts executing experiments dependent on arranged test arranging and arranged experiments in the earlier advance.

When the experiment is passed, then same can be set apart as Passed. If an experiment is fizzled, at that point relating imperfection can be accounted for to engineer group utilizing bug following framework and bug can be connected for comparing experiment for further examination. Preferably every bombed experiment ought to be related within any event single bug. Utilizing this connecting we can get the bombed experiment with a bug related with it. When the bug fixed by advancement group then the same experiment can be executed dependent on your test arranging.

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In case any of the experiments are obstructed because of any imperfection, at that point such experiments can be set apart as Blocked, so we can get the report dependent on what number of experiments passed, fizzled, blocked or not run and so forth. When the imperfections are fixed, the same Failed or Blocked experiments can be executed again to retest the usefulness

The End- Closure of Test Cycle:

Go out and call for a testing team’s meeting and assess cycle fruition criteria dependent on Test inclusion, Quality, Cost, Time, Critical Business Objectives, and Software. Talk about what all went great, which zone should be improved and taking the exercises from current STLC as a contribution to up and coming test cycles, which will release the bottlenecks in the STLC procedure. Experiment and bug report will break down to discover the deformity circulation by sort and seriousness. When complete the test cycle at that point test conclusion report and Test measurements will be readied. Test outcome examination to discover the deformity appropriation by sort and seriousness.

Advantages of Software Testing

For testing specialists, it was hard to clarify that the testing period for each undertaking is essential. Supervisors frequently consider this to be as an expense, and not a benefit source. They need to lessen this expense by decreasing the nature of the testing or with not actualizing it by any means. Since, they will likely make the most productive programming conceivable, less the most ideal programming. A frequently thought is that trying does not add to gathering income. That isn't right. Programming testing is an extraordinary device for business improvement. Advantages of programming testing are huge, and they have a critical job in the whole business. 

Advantages of Software Testing

Read: Software Testing Tutorial - Study Guide for Every Beginner in 2020

Quality Assurance & Optimization

Above all else, the nature of your item is high, and that is significant for the client. For quality, clients will, without a doubt pay more cash. Significantly progressively significant is that with selling great items, you assemble a solid notoriety and brand picture, things that are significant in the long haul.

Increased Customer Satisfaction Quotient

The focal point of each business is an upbeat client. When selling something, you know that everything does not end there. The customer can request a discount if the item does not suit him. On the off chance that the item isn't dependable, you have to put more cash in fixing or supplanting it, and afterward, you understand that it would be best that quality was controlled from the beginning. The main end is that it satisfies to create a higher quality item from the beginning. Just when you do the product testing right, you can ensure that your item is profitable and dependable. 

Increases Revenue

Talking about the benefit, the testing stage is a piece of it. A decent item needs less advancement since individuals will prescribe it to each other. Informal suggestion is the best and most profitable business you can get, and it's the best publicizing device. Offering a thoroughly tried and quality checked item means having regard for your customers. That will help in holding old clients and increasing new ones.

Not exclusively will the testing stage bring benefit, yet it will chop down existing costs. Over the long haul, it will set aside cash since you are selling programming that does not require consistent fixing. It is frequently observed that settling on quality winds up with spending more cash than arranged. Besides, the advantage of programming testing is that it permits evacuating blunders and bugs before the items get dispatched to the market. That will avert unsatisfied customers and superfluous costs that bring client service. Third, the expenses of the administration can be decreased by utilizing mechanized programming testing arrangements.

Enhanced Experience of the Client

Client experience is a noteworthy factor when putting a few items available. Programming should be straightforward, justifiable, and simple to utilize. No one but testers can guarantee that. Their experience will ensure that the product is planned in a manner that is intelligent and natural. If you need extraordinary client experience, programming should be free from bugs and mistakes, which can be a wellspring of a disappointment for clients. Picking a decent programming testing administration with an expert group will ensure the nature of an item and great client experience.

Optimizes your Business

The greatest advantage is that product testing prompts business advancement. Business advancement implies increasingly fulfilled customers, client maintenance, fewer expenses of fixing an item, fewer expenses of client assistance, better quality, and progressively dependable items, improved notoriety and brand popularity.

Testing Guidelines for Quality Assurance

Certain testing guidelines should be followed while testing the software:

  • Testing & Development team should be separate:Testing ought to consistently be performed by the testing group. The designer group ought to never test the product themselves. This is because after going through a few hours assembling the product, it may unwittingly turn out to be too proprietorial and that may avoid seeing any defects in the framework. The analyzers should have a ruinous methodology towards the item. Engineers can perform unit testing and incorporation testing; however, programming testing ought to be finished by the testing group.
  • 100% bug-free software does not exist:Testing can never demonstrate the product to 100% sans bug. As it were, there is no real way to demonstrate that the product is free of blunders even in the wake of making various test experiments.
  • Sooner you start the better it is: Testing ought to consistently begin parallelly close by the necessity investigation process. This is essential to dodge the issue of imperfection movement. It is essential to decide the test articles and degree as ahead of schedule as could reasonably be expected.
  • Order your sections:If there are surely some basic segments, at that point it ought to be guaranteed that these segments are tried with the most noteworthy need and as ahead of schedule as could be allowed.
  • Time constraint is risky:Testing time for programming is restricted. It must be remembered that the time accessible for testing isn't boundless and that a viable test plan is essential before beginning the way toward testing. There ought to be a few criteria to choose when to end the way toward testing. This standard should be chosen in advance. For example, when the framework is left with an adequate degree of hazard or as per courses of events or spending requirements.
  • Weigh the results against the unforeseen and minus inputs:Testing ought to be finished with the right information and experiments just as with imperfect experiments to ensure the framework is watertight. Experiments must be all around archived to guarantee future reuse for testing at later organizes. This implies the experiments must be enrolled with appropriate definitions and portrayals of data sources passed and individual yields anticipated. Testing ought to be accomplished for utilitarian just as the non-useful necessities of the product item.
  • Proper Inspection of the Testing Outcomes:Quantitative appraisal of tests and their outcomes must be finished. The documentation ought to be alluded to appropriately while approving the aftereffects of the experiments to guarantee legitimate testing. Testing must be upheld via computerized devices and systems; however much as could reasonably be expected. Other than guaranteeing that the framework does what all it should do, analyzers likewise need to guarantee that the framework does not perform tasks which it should do.
  • Assumptions Validation: The experiments ought to never be created based on suspicions or theory. They should consistently be approved appropriately. For example, accepting that the product item is free from any bugs while structuring experiments may bring about amazingly feeble experiments. 

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Read: QTP/UFT Tutorial Guide for Beginners

Best Practices of Software Testing Life Cycle

Here is a list of some best practices that can give you an upper hand in maintaining your quality of software, code, and other programming ventures.

1). Testing should enhance software quality & uncover bugs

Test group should concentrate on finding the deformities in the product like any deviation from the product prerequisite detail (SRS) or any change from the ideal yield. Likewise, the test group should concentrate on execution, unwavering quality of programming to improve programming quality.

 2). SDLC and STLC go hand in hand

As in the conventional programming improvement models like the cascade model, testing is done simply after specific periods of advancement, so test group isn't required all through the SDLC. This isn't the correct way to deal with get the best quality software. To do viable testing the test group ought to be incorporated from the prerequisites stage until the usage period of the product.

3). Black-Box & White-Box Testing both need to be done

Test group ought to perform both discovery testing or user testing, for example on the off chance that the product should create certain yield by playing out some arrangement of activities then that yield ought to be confirmed by following that arrangement of steps. Also, the white-box testing or basic testing, which tests the inside rationale of the framework ought to likewise be accomplished for the product.

4). Use business logic while performing testing

Any product application plays out some business rationale and gives the arrangement. The test group should test all the business rationale of the product and guarantee that the rationale is executed effectively and gives wanted outcomes

5). Ensure an effective execution with minimal risks

The testing group should put their full exertion and perform testing successfully with insignificant assets. The test procedure ought to be all around characterized so that there is an insignificant fluctuation between the assignments performed from analyzer to tester. Since programming testing is the control which furnishes the board with the hazard data so they can take vital activities to decrease the undertaking and item risks.


Software testing is an integral part of any IT product or service. It is a process that determines whether or not your codes are working as they should be or not. Like we discussed in the very beginning, improper testing can lead to detrimental disasters that can cost many lives and fortune. Therefore, the organizations need to spend time on testing ventures and optimize the same with the help of best testing talent.

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