Comparing Software Development Life Cycle Vs Software Testing Life Cycle: Everything You Need To Know!

Table of Contents

A3Logics 29 Dec 2023

Table of Contents


Software Development Life Cycle (SDLC) and Software Testing Life Cycle (STLC) are two essential concepts that must be understood when developing a software product. Choosing between them depends on the project requirements, budget, timeline, and other factors.


The SDLC is a process for creating and managing software projects. It is a systematic approach to developing, testing, deploying and maintaining software applications. The SDLC outlines the steps that are necessary for efficiently producing quality software. 


It includes various steps such as planning, analysis, design, development, testing, implementation, and maintenance. These steps ensure that the end product meets customer requirements as stated in the requirement document.


The Software Testing Life Cycle is focused on the testing aspect of the entire software development process. It includes various steps such as planning for testing, identifying test scenarios, creating test cases and executing them, analyzing results, and reporting any defects found. This life cycle ensures that the product meets all the requirements and is free from defects.


The importance of these two life cycles cannot be stressed enough. According to a study conducted by Forbes, over 70% of software projects fail due to a lack of quality assurance throughout the development process. This shows how important it is to have both an SDLC and an STLC in place before starting the software development process.


Moreover, having a Software Development Life Cycle vs. a Software Testing Life Cycle helps ensure the project is completed on time and within budget. It helps reduce ambiguity between stakeholders and any potential risks associated with the project. Additionally, it also helps to improve product quality by ensuring compliance with industry standards and regulations.


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Introduction to Software Testing Life Cycle


STLC is a set of activities testers conduct to ensure the intended software meets the custom software development services and technical requirements. It is a systematic approach to testing software throughout its development life cycle. STLC helps ensure that the quality of the software product is achieved without any faults or bugs.


The primary purpose of the Software Testing Life Cycle is to identify any defects or gaps in the software so that they can be rectified at the earliest. The testing process is divided into various phases, covering tasks and activities. Each step helps in ensuring that the desired outcome is achieved. The STLC process typically includes the following stages: planning, analysis, design, implementation, execution, and closure. 


In addition to the benefits listed above, studies have shown that implementing a robust Software Testing Life Cycle concerning software development project management significantly reduces the time and money spent on software development. According to a paper published by Forbes, a study conducted at Microsoft found that introducing an effective Software Testing Life Cycle saved them over $1 billion in costs associated with software development and maintenance. This shows the cost savings achieved when an effective STLC is implemented. 


Software Testing Life Cycle ensures that all development requirements are met by providing a systematic approach for testing software throughout its life cycle. This helps in ensuring that the software meets the desired quality standards and is free from any defects or bugs.


Understanding of Software Development Life Cycle


It provides structure to developing software. It comprises several stages that software developers must complete to ensure the successful creation and maintenance of a product, which is very important for microservices architectures. This includes planning, designing, coding, testing, deploying and maintaining


The SDLC process is an iterative one, which means it can be repeated as needed to ensure the successful completion of the project. Each iteration provides an opportunity for fintech software development service providers to improve upon their code and correct any defects or bugs that have been discovered along the way. Additionally, the software development life cycle process allows for rapid feedback so that problems can be identified and addressed quickly. This helps to reduce costs associated with the development of software.


For instance, a study by the Project Management Institute (PMI) found that organizations using structured software development processes, such as SDLC, are more likely to meet their objectives than those without such procedures. The study also showed that these organizations achieved higher customer satisfaction and lower costs than those without a structured development process.


In addition, a study by the Standish Group found that organizations that use SDLC are more likely to complete their software projects than those without an established development process. These results suggest that a well-defined SDLC can help organizations reduce project risk and successfully implement their software solutions.


Understanding The Differences: Software Development Life Cycle(SDLC) vs Software Testing Life Cycle (STLC)


Sr.No. Software Development Life Cycle (SDLC) Software Testing Life Cycle (STLC)
1. The SDLC defines all the stages of software development from planning and requirements gathering to testing, deployment, and maintenance. The STLC defines all the stages of software testing from identifying test objectives to analyzing test results and reporting.
2.  It is an iterative process that involves multiple stages and activities. It is a sequential process that involves several phases and tasks.
3. The main goal of SDLC is to ensure the successful development of a software product that meets customer expectations. The main goal of STLC is to identify any defects or gaps in the software so that they can be rectified at the earliest.
4. SDLC follows an incremental approach with each iteration making improvements to the product. STLC follows a continuous approach with each phase being completed before the next one can begin.
5. SDLC involves multiple stakeholders such as developers, designers, and quality assurance personnel. STLC involves custom software development for startups who are responsible for executing tests and providing feedback on the results.


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What are The Software Testing Life Cycle (STLC) Phases?


Software Testing Life Cycle (STLC) is the process of testing software that helps to identify any errors, bugs, or gaps in comparison to the business requirements. It is a well-defined process of activities that need to be performed by testers during the software testing project. Software development project management contains different phases, such as planning and monitoring, test analysis and design, implementation and execution, and closure activities. This section will explain the STLC phases with their respective activities.


1. Test Planning and Monitoring


This phase involves understanding the requirements, planning for the tests, and determining the testing strategy to be followed. The resources required for testing, scheduling of tasks, and estimation of time duration for the test cycle should also be planned in this phase.


2. Test Analysis and Design


This phase involves analyzing the requirements specified in the document, defining the test conditions, creating test cases, and developing test data. This phase also helps to identify any risks associated with system testing.


3. Implementation and Execution


The actual execution of the tests begins in this phase. The test cases are executed with the planned data. Any defects found during the testing process are also recorded and tracked for better results in microservices architectures.


4. Test Closure Activities


This phase involves analyzing the results of the tests, preparing a final report that includes all the details about any defects found, and submitting it to the project stakeholders. 


5. Evaluation


This phase involves evaluating the test results and validating them against the expected results. It helps to gain insights into the quality of the software developed.


Advantages of the Software Testing Life Cycle (STLC)


The framework outlines the steps and procedures for each step of the software development process, from planning to executing tests and delivering results using agile methodology in software development. Here are some of the advantages of using the STLC:


1. Improved Quality Assurance


It helps to ensure that all stages of software development are tested thoroughly. It ensures that any errors or bugs are identified and corrected before deployment, increasing the overall quality of the software.


2. Faster Project Delivery


By following the Software Testing Life Cycle (STLC ), organizations can improve the speed at which they deliver their software projects. 


3. Cost Savings


By using the STLC, organizations can identify and rectify issues earlier on in the development process. Software development frameworks also help reduce the cost of required changes and repairs once the software is live.


4. Improved Customer Satisfaction


By providing high-quality software products, organizations can improve customer satisfaction and loyalty. It is because customers receive a product that works as expected and satisfies their requirements. It should also adapt to various trends that are improving the performance of the software, like artificial intelligence in software development


5. Better Team Collaboration


The STLC encourages better collaboration between team members, as each member understands the process and how it affects their role. This helps to reduce confusion and ensure that everyone is working together towards achieving the same goal.


6. Increased Risk Management


By following the Software Testing Life Cycle (STLC), organizations can better manage their risks throughout the software development process. Custom software development for startups includes anticipating any potential problems and preparing for them ahead of time, which reduces the chances of costly mistakes or delays in the future.


7. Improved Documentation


Documentation encourages teams to document their processes and results, which helps to ensure that the same process is followed each time. 


8. Improved Communication


Communication encourages better communication between team members and stakeholders. It also helps to ensure that everyone is informed of the project’s progress, especially between healthcare software development companies and clients, allowing for timely decision-making and a better understanding of what is being worked on.


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What are The Software Development Life Cycle(SDLC) Phases?


The SDLC is a set of steps and activities software engineers use to develop a software product. The SDLC encompasses all stages of the development process, from initial planning to final implementation. Each phase of the SDLC focuses on specific tasks and goals, with the ultimate goal to create a quality product that meets customer needs.


The Phases of the Software Development Life Cycle:


1. Planning


The planning phase is when a team of software engineers and other stakeholders come together to define the project goals, objectives, and requirements. 


2. Analysis


The analysis phase is a deeper dive into the project needs. This includes attributes like expected performance, software security, scalability, etc. It’s also during this stage that any potential risks or issues can be identified and addressed before they become significant problems.


3. Design


After the analysis phase is complete, the design phase begins. This includes designing the architecture and user interface of the software. It’s during this phase that custom software development service providers decide on technologies, programming languages, and tools to use to create the software.


4. Implementation


The implementation phase is where all the planning and analysis finally come together. During this stage, fintech software development service providers begin coding according to the design specifications.


5. Testing


After creating the software, it must be tested to ensure it meets the requirements and performs as expected. This includes manual testing of the user interface and automated testing of the code.


6. Deployment


The deployment phase involves releasing or publishing the software in a production environment for users to access. This includes setting up hosting servers and configuring the software for launch.


7. Maintenance


Once the software is released, it includes patching, updating, and troubleshooting any problems that arise. The success of a software development project depends heavily on the quality of its end product. 


Advantages of the Software Development Life Cycle


The SDLC is a process developers use to create and maintain software applications. Each step in the process is essential for ensuring the successful delivery of a quality product. On the other hand, the Software Testing Life Cycle (STLC) is a set of processes and activities designed to ensure that software products meet the defined requirements and are fit for use. The STLC is an integral part of the software development process and helps identify potential bugs early in the development cycle.


Advantages of the Software Development Life Cycle:


1. Ensures Quality


The SDLC provides a structured process that ensures quality. Using the standard procedures established by the SDLC, developers can reduce errors and increase efficiency throughout the development process with agile methodology in software development. The use of an iterative approach to software development helps identify problems early on, reducing time and money spent in addressing issues during later stages of development.


2. Improved Communication


The SDLC facilitates improved communication between developers and other stakeholders. A structured approach to software development can help ensure that all stakeholders, such as clients, management, and end-users, know the project’s progress. This helps reduce misunderstandings and eliminates costly delays due to a lack of communication.


3. Cost Savings


The SDLC allows for cost savings by reducing the number of errors made at the development stage. By catching potential problems early on, custom software development companies in USA can save money on costly fixes and reworks required if the errors are found later in the project.


4. Increased Efficiency


The SDLC helps ensure that software is developed efficiently by using an iterative approach to development. It allows for changes to be made quickly. Which are also easy during each product iteration. 


5. Improved Risk Management


The SDLC helps to manage risk by providing a structured process for managing potential risks throughout the development cycle. By following the standard procedure, developers can identify and mitigate potential threats before they become an issue. This improves the overall quality of the software and reduces the cost associated with addressing any potential problems.


6. Improved Collaboration


The SDLC encourages collaboration between developers and other stakeholders. By following the SDLC, all participants can work productively to create a successful outcome. Collaboration between healthcare software development companies helps ensure that everyone is on the same page and that any disagreements are addressed quickly before they become an issue.


7. Holistic Planning


The SDLC provides a holistic view of the software development project. It helps developers to identify potential issues early on and plan accordingly for the entire project, including design, development, testing, and implementation. 


Why Is the Software Development Life Cycle (SDLC) Vital in the Software Development Process?


The SDLC is an essential part of the software development process. The purpose of the SDLC is to provide a systematic approach to creating reliable, secure, and high-quality software products.


The SDLC has several advantages that make it invaluable in software development. For starters, it allows developers to clearly define the requirements and objectives for a project before any coding begins. Additionally, by using a structured approach to software development, developers can better identify potential problems early in the process and address them accordingly.


The SDLC provides a roadmap for teams to follow as they develop software. This helps reduce errors and bugs, saves costs, and ensures customer satisfaction with the end product. Custom software development consulting companies outline the steps needed to develop and deliver software to the customer in an efficient, cost-effective, and timely manner. The SDLC defines the stages involved in creating software from conception to release. Additionally, it facilitates collaboration between stakeholders, such as developers, project managers, and customers.


Finally, the SDLC provides an efficient way to manage changes during the development process. This allows developers to adjust quickly and cost-effectively to produce a successful outcome.


How delicately is the balance between efficiency (SDLC) and quality (STLC) in software projects?


Software projects require balancing efficiency (SDLC) and quality (STLC). The SDLC, which is the process of developing software, involves the creation and implementation of a plan for the development of a software product. This process includes planning, development, testing, performance, and maintenance.


On the other hand, the STLC tests the software product to ensure its quality and functionality. The STLC comprises five phases: planning, analysis, design, execution, and reporting. During the planning phase, testers determine which tests to run and create test cases for those tests. In the analysis phase, they review requirements documents and develop a testing strategy.


During the design phase, custom software development consulting companies create test cases based on the test strategy. The execution phase is where the actual testing takes place, and the testers identify any failures or defects in the system. In the last step, they create reports of their findings and suggest corrective action if necessary. By combining these two processes, software projects can produce high-quality products promptly.


How to Optimize Workflow by Integrating SDLC and STLC Effectively in Software Projects?


Software projects are becoming increasingly complex, and as a result, managing them poses more challenges. To help address these challenges, an effective way to optimize workflow is by integrating SDLC and STLC. Together, they form the foundation of successful software projects.


The SDLC defines the software development process, while the STLC focuses on quality assurance and testing. SDLC outlines the various stages of software development, from conceptualization to deployment. 


Team members need to understand how both the SDLC and STLC work together to optimize workflow. The SDLC identifies the tasks that need to be completed in microservices architectures, while the STLC validates and verifies if the jobs are done correctly. 


How to Select the Best IT Services Provider for Your Software Project?


When selecting an IT services provider for your software project, there are a few key considerations to keep in mind. The following tips can help you select the best IT services provider for your specific needs.


1. Research


It’s important to research when looking for a reliable IT service provider. Ensure they have experience working with the type of software you need and inquire about their success rate on similar projects. Don’t be afraid to ask for references from previous clients as well.


2. Cost


Not all IT service providers charge the same rates for their services. Compare pricing and services to ensure you’re getting the best deal.


3. Knowledge


An experienced and knowledgeable IT service provider is a must for any successful software project. Ensure the provider you choose has extensive experience in the software and development process you need.


4. Support


Technical support is essential during any software development process, so make sure your chosen IT service provider offers round-the-clock customer support.


5. Flexibility


Ensure the custom software development consulting companies you select will be flexible and accommodating to your needs. They should be open to changes in scope or timeline if necessary.


6. Quality Assurance


Quality assurance is critical in software development, so ensure the IT service provider you choose is committed to delivering high-quality software and microservices architectures. 


7. Processes


It’s essential to ensure that the IT service provider you choose has a thorough and well-defined process in place for software development. This should include an established timeline, clear communication channels, and feedback loops.


8. Expertise


The IT service provider you select should have experts on staff with experience in the specific type of software you need. 


With these tips, you can select the best IT services provider for your software project. The key is to do your research, compare prices and services, and make sure the provider you choose is experienced in the type of software you need.





The SDLC and STLC are two crucial software development frameworks for software development and testing, respectively. SDLC is concerned with developing quality software products, while STLC focuses on ensuring that the software meets customer requirements and expectations.


Both SDLC and STLC have several phases associated with them. In the SDLC, the stages include planning, analysis, design, implementation, and maintenance. The STLC consists of six steps, including test planning and control, test analysis and design, test case development and execution, result analysis and reporting, defect tracking, and closure.


When it comes to comparing the two cycles, both have their advantages. SDLC is efficient in terms of creating quality software products promptly. STLC, conversely, ensures that the software meets customer requirements and expectations. At the same time, selecting the right IT service providers is essential for successful software projects.


In conclusion, comparing SDLC and STLC is crucial for successful software projects. While SDLC focuses on creating quality software products, STLC ensures that the software meets customer requirements and expectations. To optimize workflow by integrating both cycles efficiently, it is essential to balance efficiency (SDLC) and quality (STLC). Moreover, selecting the best IT services provider is critical for successful software projects.


Unlock the Answers: Your FAQs, Our Expertise!


Q1. What is the difference between a Software Development Life Cycle and a Software Testing Life Cycle?


The main difference between SDLC and STLC is that SDLC focuses on developing a software product. This testing helps to ensure that the software meets customer requirements and is ready for deployment into a production environment.


Q2. What are the phases of SDLC?


The phases of SDLC include Planning, Analysis, Design, Implementation, and Maintenance.


Q3. What are the phases of STLC?


The phases of STLC include Test Planning and Control, Test Analysis and Design, Test Case Development and Execution, Result Analysis and Reporting, and Defect Tracking and Closure.


Q4. What are the advantages of SDLC?


The advantages of SDLC include improved quality, increased customer satisfaction, cost savings, and time reduction.


Q5. What are the advantages of STLC?


The advantages of STLC include:

  • Ensuring that the artificial intelligence in software development meets customer requirements and expectations.
  • Reducing risks of bugs in production.
  • Allowing for an efficient testing process.