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<p>User Acceptance Testing (UAT) and Usability Testing &#8211; these terms might sound similar but different. This blog will guide you about User Acceptance Testing vs. Usability Testing.</p>



<div id="toc_container" class="no_bullets"><p class="toc_title">Table Of Contents</p><ul class="toc_list"><li><a href="#User_Acceptance_Testing_vs_Usability_Testing_8211_Overview"><span class="toc_number toc_depth_1">1</span> User Acceptance Testing vs Usability Testing &#8211; Overview</a><ul><li><a href="#What_is_Usability_Testing"><span class="toc_number toc_depth_2">1.1</span> What is Usability Testing?</a></li><li><a href="#What_is_User_Acceptance_Testing"><span class="toc_number toc_depth_2">1.2</span> What is User Acceptance Testing?</a></li></ul></li><li><a href="#User_Acceptance_Testing_vs_Usability_Testing_8211_Key_Differences"><span class="toc_number toc_depth_1">2</span> User Acceptance Testing vs Usability Testing &#8211; Key Differences</a></li><li><a href="#User_Acceptance_Testing_vs_Usability_Testing_8211_Can_they_be_automated"><span class="toc_number toc_depth_1">3</span> User Acceptance Testing vs Usability Testing &#8211; Can they be automated?</a></li><li><a href="#Summary"><span class="toc_number toc_depth_1">4</span> Summary</a></li><li><a href="#Frequently_Asked_Questions"><span class="toc_number toc_depth_1">5</span> Frequently Asked Questions</a><ul><li><a href="#Is_UAT_a_usability_testing"><span class="toc_number toc_depth_2">5.1</span> Is UAT , a usability testing?</a></li></ul></li></ul></div>
<h2 class="wp-block-heading" id="user-acceptance-testing-vs-usability-testing-overview"><span id="User_Acceptance_Testing_vs_Usability_Testing_8211_Overview"><strong>User Acceptance Testing vs Usability Testing &#8211; Overview</strong></span></h2>



<h3 class="wp-block-heading" id="h-what-is-usability-testing"><span id="What_is_Usability_Testing">What is Usability Testing?</span></h3>



<p>Usability testing is when people try out a product, website, or app to see how easy it is. The testing aims to identify users&#8217; issues or problems while using the product. Usability testing can help improve the overall user experience and increase customer satisfaction. </p>



<p>During usability testing, participants are given specific tasks to complete while using the product. The testers observe and take notes on how the participants interact with the product, noting any areas of confusion or difficulty. </p>



<p>After the testing, the results are analyzed, and changes can be made to improve the product&#8217;s usability. Usability testing can be done at any stage of the product development process, from early prototypes to finished products.</p>



<p>For example, a company has developed a new mobile app. Before launching it to the public, they conduct usability testing by inviting individuals to use the app and provide feedback. The testers are given specific tasks to complete, and their interactions with the app are observed and recorded. The company can make necessary changes based on feedback to improve the app&#8217;s usability and ensure a better user experience.</p>



<p><strong>Read all about &#8211; </strong><a href="https://testsigma.com/guides/usability-testing/" target="_blank" rel="noreferrer noopener"><strong>Usability Testing</strong></a>.</p>



<h3 class="wp-block-heading" id="h-what-is-user-acceptance-testing"><span id="What_is_User_Acceptance_Testing">What is User Acceptance Testing?</span></h3>



<p>User Acceptance Testing (UAT) is testing that end-users or customers perform to ensure that the software or application meets their specific requirements and expectations. It is usually the last testing stage before the product is released. </p>



<p>During UAT, users go through required test scenarios and perform various tasks and actions to ensure the software works in different scenarios. They also report any issues or bugs they encounter during testing, and then the team works on fixing those issues.</p>



<p><strong>Read all about &#8211; <a href="https://testsigma.com/guides/uat-testing/" target="_blank" rel="noreferrer noopener">User Acceptance Testing</a></strong></p>



<p>In summary, the development team should carry out UAT during the final stages of preparation before releasing the software to the end users.</p>



<h2 class="wp-block-heading" id="h-user-acceptance-testing-vs-usability-testing-key-differences"><span id="User_Acceptance_Testing_vs_Usability_Testing_8211_Key_Differences"><strong><strong>User Acceptance Testing vs Usability Testing</strong></strong> &#8211; <strong>Key Differences</strong></span></h2>



<figure class="wp-block-table aligncenter"><table><tbody><tr><td><strong>Feat<strong>ures</strong>                                                         </strong></td><td><strong>Usability Testing</strong></td><td><strong>UAT</strong></td></tr><tr><td><strong>Definition</strong></td><td>Evaluates software&#8217;s ease of use and efficiency, including its interface, navigation, and user experience elements.</td><td>Verifies and validates that the software meets the user&#8217;s requirements and functions as intended in terms of functionality, usability, and performance.</td></tr><tr><td><strong>Goal</strong></td><td>Identify usability issues and enhance the software&#8217;s design and user experience.</td><td>Ensure that the software meets the business requirements and achieves the desired outcomes.</td></tr><tr><td><strong>Testing time</strong></td><td>It is done at all stages of software development.</td><td>This testing is conducted towards the end of the software development life cycle.</td></tr><tr><td><strong>Testers</strong></td><td>Usability experts, UI designers, and end-users who may interact with the software.</td><td>Actual end-users, business representatives, or subject matter experts who will perform real-world tasks.</td></tr><tr><td><strong>Feedback</strong></td><td>Focuses on subjective feedback, including user satisfaction, frustration, and experience.</td><td>Focused on objective feedback, including defects, issues, and discrepancies.</td></tr><tr><td><strong>Tools</strong></td><td>Various tools, such as mockups, <a href="https://www.figma.com/resource-library/what-is-wireframing/" target="_blank" rel="noreferrer noopener">wireframes</a>, and design prototypes to observe user interactions and record observations.</td><td>Test management software, test automation frameworks, and API testing tools to verify functionality and check for defects.</td></tr></tbody></table></figure>



<h2 class="wp-block-heading" id="h-user-acceptance-testing-vs-usability-testing-can-they-be-automated"><span id="User_Acceptance_Testing_vs_Usability_Testing_8211_Can_they_be_automated"><strong>User Acceptance Testing vs Usability Testing</strong> &#8211; <strong>Can they be automated?</strong></span></h2>



<p>Some aspects of User Acceptance Testing (UAT) and <a href="https://testsigma.com/guides/usability-testing/" target="_blank" rel="noreferrer noopener">Usability Testing</a> can be automated using various testing tools, notably the software&#8217;s user interface (UI) component. However, it is necessary to note that both UAT and Usability Testing rely heavily on subjective evaluation by human testers, which makes complete automation difficult. </p>



<p>For example, <a href="https://testsigma.com/user-interface-testing-tools" target="_blank" rel="noreferrer noopener">UI testing tools</a> like Selenium or Testsigma can automate functional testing in UAT and simulate user interactions for Usability Testing. These tools can check if the software functions as intended and whether the user interface meets the usability standards.</p>



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<h2 class="wp-block-heading" id="h-summary"><span id="Summary"><strong>Summary</strong></span></h2>



<p>Alright, folks! So, we&#8217;ve talked about UAT, Usability Testing, the differences between User Acceptance Testing and Usability Testing, and how important they are for a successful product launch. </p>



<p>User Acceptance Testing aims to ensure that the product meets stakeholders&#8217; requirements, while Usability Testing aims to ensure the product is easy and intuitive for end-users. And lastly, we also discussed some tools that can help us automate some UI tests that would be executed as part of usability and UAT testing. </p>



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<h2 class="wp-block-heading" id="h-frequently-asked-questions"><span id="Frequently_Asked_Questions"><strong>Frequently Asked Questions</strong></span></h2>



<h3 class="wp-block-heading" id="is-uat-a-usability-testing"><span id="Is_UAT_a_usability_testing">Is UAT , a usability testing?</span></h3>



<p>Yes, UAT (User Acceptance Testing) is a type of usability testing that involves end-users evaluating a system to ensure it meets their needs and requirements.</p>



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user acceptance testing vs usability testing

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Top 10 Mobile Test Automation Frameworks - 2023

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<p><a href="https://testsigma.com/automated-api-testing" target="_blank" rel="noreferrer noopener">API testing</a> is essential to ensure that APIs are functionally correct and reliable. This article aims to introduce performance testing for APIs.</p>



<div class="overview-wrapper">
  <div id="toc_container" class="no_bullets"><p class="toc_title">Table Of Contents</p><ul class="toc_list"><li><a href="#Overview"><span class="toc_number toc_depth_1">1</span> 
  Overview
  </a></li><li><a href="#What_is_API_Performance_Testing"><span class="toc_number toc_depth_1">2</span> What is API Performance Testing?</a></li><li><a href="#Why_Performance_Test_Your_API"><span class="toc_number toc_depth_1">3</span> Why Performance Test Your API?</a></li><li><a href="#API_Performance_Testing_Types"><span class="toc_number toc_depth_1">4</span> API Performance Testing Types</a></li><li><a href="#Ways_of_Measuring_Your_API8217s_Performance"><span class="toc_number toc_depth_1">5</span> Ways of Measuring Your API&#8217;s Performance</a><ul><li><a href="#Passive_API_Monitoring"><span class="toc_number toc_depth_2">5.1</span> Passive API Monitoring</a></li><li><a href="#Active_API_Monitoring"><span class="toc_number toc_depth_2">5.2</span> Active API Monitoring</a></li><li><a href="#API_Load_Testing"><span class="toc_number toc_depth_2">5.3</span> API Load Testing</a></li></ul></li><li><a href="#Recommendations_for_API_performance_testing"><span class="toc_number toc_depth_1">6</span> Recommendations for API performance testing</a></li><li><a href="#Conclusion"><span class="toc_number toc_depth_1">7</span> Conclusion</a></li><li><a href="#Frequently_Asked_Questions"><span class="toc_number toc_depth_1">8</span> Frequently Asked Questions</a><ul><li><a href="#Which_tool_is_best_for_API_performance_testing"><span class="toc_number toc_depth_2">8.1</span> Which tool is best for API performance testing?</a></li><li><a href="#What_is_the_difference_between_API_load_testing_and_performance_testing"><span class="toc_number toc_depth_2">8.2</span> What is the difference between API load testing and performance testing?</a></li><li><a href="#How_do_I_test_REST_API_performance"><span class="toc_number toc_depth_2">8.3</span> How do I test REST API performance?</a></li></ul></li></ul></div>
<h2 class="overview-head"><span id="Overview">
  Overview
  </span></h2>
  <div class="overview-para-wrapper">
<p class="overview-para"><strong>What is API Performance Testing?</strong></p>
<p class="overview-para">API performance testing checks how well an API handles heavy traffic and whether it maintains performance under different load conditions.</p>
<p class="overview-para"><strong>API Performance Testing Types</strong></p>
<ul class="ov-list-wrapper">
  <li class="ov-list"><strong>Load Testing:</strong> Identifies how much load the application can handle by analyzing performance under a specific user load.</li>
  <li class="ov-list"><strong>Endurance Testing:</strong> Checks if the application remains stable during prolonged, continuous usage.</li>
  <li class="ov-list"><strong>Stress Testing:</strong> Determines the breaking point of the application when pushed beyond normal load limits.</li>
  <li class="ov-list"><strong>Spike Testing:</strong> Evaluates how the application reacts to sudden spikes or drops in user traffic.</li>
  <li class="ov-list"><strong>Volume Testing:</strong> Tests how the application performs when processing large volumes of data, such as during migrations or bulk operations.</li>
</ul>
<p class="overview-para"><strong>How to Measure API Performance Testing</strong></p>
<ul class="ov-list-wrapper">
  <li class="ov-list"><strong>1. Passive API Monitoring:</strong></li>
  <li class="ov-list">Analyzes existing network traffic without sending test requests.</li>
  <li class="ov-list">Tracks request count, response time, and data exchange.</li>
  <li class="ov-list">Detects performance issues without impacting the system.</li>
  <li class="ov-list"><strong>2. Active API Monitoring:</strong></li>
  <li class="ov-list">Sends automated test traffic to evaluate API response.</li>
  <li class="ov-list">Simulates user behavior and monitors in real time.</li>
  <li class="ov-list">Triggers alerts if errors or delays are found.</li>
  <li class="ov-list"><strong>3. API Load Testing:</strong></li>
  <li class="ov-list">Simulates user traffic to test API performance under peak load.</li>
  <li class="ov-list">Confirms the API can handle expected usage without slowdowns or failures.</li>
</ul>
  </div>
</div>



<h2 class="wp-block-heading" id="h-what-is-api-performance-testing"><span id="What_is_API_Performance_Testing"><strong>What is API Performance Testing?</strong></span></h2>



<p>API performance testing evaluates an application programming interface (API) to assess its ability to handle high loads. Also, to maintain high-performance levels under varying conditions.</p>



<div class="wp-block-image"><figure class="aligncenter size-full is-resized"><img loading="lazy" decoding="async" src="https://testsigma.com/blog/wp-content/uploads/api-performance-testing_in-article.jpg" alt="API Performance Testing" class="wp-image-27944" width="600" height="400"/></figure></div>



<p>Here are some key points related to API performance testing, that you know about:</p>



<ol class="wp-block-list"><li><strong>Goal of API performance testing</strong>: API performance testing evaluates the API&#8217;s responsiveness, throughput, resource utilization, and scalability. This ensures it can meet the expected load and maintain stability and reliability.</li><li><strong>Environment’s role in testing</strong>: Testers simulate high loads and extreme conditions to analyze the API&#8217;s performance. Tester also tests if it is scalable and optimized to handle such loads.</li><li><strong>Various Testing methods</strong>: Testers use performance testing tools that simulate user loads, monitor network traffic, analyze response times &amp; other metrics, and identify bottlenecks.</li><li><strong>Metrics</strong>: Testers measure the API&#8217;s performance based on various metrics, including response times, request volumes, error rates, and other characteristics associated with the application and user behavior.</li><li><strong>Importance</strong>: API performance testing helps improve the application&#8217;s overall performance and stability.</li><li><strong>Role of Analysis and reporting</strong>: Testers analyze API performance data and generate reports. It provides valuable insights into the API&#8217;s overall performance, identifying areas of strength and weakness.</li></ol>



<h2 class="wp-block-heading" id="h-why-performance-test-your-api"><span id="Why_Performance_Test_Your_API"><strong>Why Performance Test Your API?</strong></span></h2>



<p>When learning something new, asking a &#8220;why&#8221; question is beneficial. Doing so can help to facilitate further research and understanding. Today, as we learn about API performance testing, it is essential to recognize the significance of this process.</p>



<ol class="wp-block-list"><li>It can help you identify and troubleshoot bottlenecks, discover performance issues, determine the impact of changes, and measure overall performance.</li><li>It can also help you understand how your API will handle different types of traffic. This enables you to anticipate and plan for peak loads.</li><li>By testing your API before deployment, you can ensure that your API is flexible and can handle the demands of the real world.</li></ol>



<h2 class="wp-block-heading" id="h-api-performance-testing-types"><span id="API_Performance_Testing_Types"><strong>API Performance Testing Types</strong></span></h2>



<p>It is time to learn about the various types of API performance testing. Here we go:</p>



<ol class="wp-block-list"><li><a href="https://testsigma.com/guides/load-testing/" target="_blank" rel="noreferrer noopener">Load Testing</a>: In this testing, the maximum operating capacity of the application was identified. The testing involved analyzing the application&#8217;s performance when exposed to a specific load.</li><li>Endurance Testing: The stability and reliability of an application are set through Endurance Testing, also known as <a href="https://testsigma.com/blog/soak-testing/" target="_blank" rel="noreferrer noopener">Soak Testing</a>. It helps to determine if the application can handle continuous usage without any problems for long durations.</li><li><a href="https://testsigma.com/blog/software-stress-testing/" target="_blank" rel="noreferrer noopener">Stress Testing</a>: We understand how an application behaves when pushed further to its normal capacity by performing stress testing. It helps to identify the breaking point of an application and determine if it can handle extreme loads.</li><li>Spike Testing: This type of performance testing evaluates how an application responds when a sudden increase or decrease in user load. This often happens during promotional campaigns or holidays.</li><li><a href="https://testsigma.com/blog/volume-testing/" target="_blank" rel="noreferrer noopener">Volume Testing</a>: This type of performance testing evaluates how an application performs when large amounts of data are processed simultaneously. It can happen during data migration or bulk uploads/downloads from databases.</li></ol>



<h2 class="wp-block-heading" id="h-ways-of-measuring-your-api-s-performance"><span id="Ways_of_Measuring_Your_API8217s_Performance"><strong>Ways of Measuring Your API&#8217;s Performance</strong></span></h2>



<p>API performance can be measured by:</p>



<ul class="wp-block-list"><li>Tracking response times,</li><li>Monitoring errors and latency,</li><li>Testing for scalability, and</li><li>at last, is using analytics tools to track usage.</li></ul>



<p><strong>Let&#8217;s have a look at these metrics briefly.</strong></p>



<ol class="wp-block-list"><li>Response time is one of the most important metrics for measuring API performance. Because it provides insight into how quickly the API can respond to requests.</li><li>Monitoring errors and latency can also provide valuable insights into the performance of the API. Tracking errors allows testers to identify user experience issues and ensure that the API functions consistently and correctly.</li><li>Testing for scalability allows you to ensure that your API can handle increased traffic or usage without becoming overloaded. (Slowing down)</li><li>Finally, the analytics tools can track usage patterns. This helps to identify areas for improvement.</li></ol>



<p>By utilizing these methods, you can better understand your API&#8217;s performance and make any required adjustments to improve its performance.</p>



<h3 class="wp-block-heading" id="h-passive-api-monitoring"><span id="Passive_API_Monitoring"><strong>Passive API Monitoring</strong></span></h3>



<p>Passive API monitoring analyzes the network traffic and data transactions within an API to identify potential issues, bottlenecks, and security threats. Unlike active testing, passive monitoring does not involve sending traffic to the server, reducing the risk of introducing unintended consequences.</p>



<p>For example, One example of passive API monitoring involves using network monitoring tools to capture and analyze network traffic in real time. This approach enables testers to gather information about</p>



<ul class="wp-block-list"><li>the API&#8217;s behavior,</li><li>including the number of requests,</li><li>the response time, and</li><li>shared data.</li></ul>



<p>Testers can use this data to identify performance issues, network lag, or other performance issues and investigate the potential causes to address them.</p>



<p>So if you want to ensure that your APIs are operating smoothly and efficiently, consider using passive API monitoring as part of your solution.</p>



<h3 class="wp-block-heading" id="h-active-api-monitoring"><span id="Active_API_Monitoring"><strong>Active API Monitoring</strong></span></h3>



<p>Active API monitoring sends traffic to the server to determine how it responds to different requests under different load conditions. Unlike passive monitoring, active monitoring involves</p>



<ul class="wp-block-list"><li>generating traffic by running automated tests,</li><li>simulating user behavior or scenarios, and</li><li>monitoring the results in real time.</li></ul>



<p>It provides rich metrics on the application&#8217;s behavior and can help testers identify areas requiring detailed analysis.</p>



<p>Here is an example that explains Active API monitoring easily.</p>



<p>Let&#8217;s say you are a tester working on a <a href="https://testsigma.com/mobile-testing" target="_blank" rel="noreferrer noopener">mobile app </a>that relies heavily on an API to fetch data from an external server. You have implemented Active API monitoring to ensure the API is always available and functioning correctly. </p>



<p>To do this, you have set up a monitoring system that sends ten requests to the API every second. The monitoring system checks if the API responds correctly and if the response time is within acceptable limits. </p>



<p>If the monitoring system detects issues, such as the API taking too long to respond or returning errors, it immediately triggers an alert. This alert can be an email or a Slack message to the development team, notifying them of the issue. </p>



<p>The testers can then investigate and fix the issue before it causes any major problems for mobile app users. This helps ensure that the app provides a seamless experience for users at a decent load, with minimal disruption caused by backend issues.</p>



<h3 class="wp-block-heading" id="h-api-load-testing"><span id="API_Load_Testing"><strong>API Load Testing</strong></span></h3>



<p>In software development, load tests simulate the number of users accessing a system or service. For example, load tests can be used to evaluate the performance of a website or application under different user loads. To put it in simple words,</p>



<ul class="wp-block-list"><li>API load testing ensures the API can handle the expected traffic levels during peak usage.</li><li>This helps reduce the risk of service trouble or performance degradation when the API is used in high-volume applications.</li></ul>



<h2 class="wp-block-heading" id="h-recommendations-for-api-performance-testing"><span id="Recommendations_for_API_performance_testing"><strong>Recommendations for</strong><strong> API performance testing</strong></span></h2>



<p>Here are some recommendations for API performance testing that will help ensure that the APIs are reliable, responsive, and readily available.</p>



<ol class="wp-block-list"><li><strong>Decide the testing strategy according to the type of application</strong>: Different applications require different performance levels and <a href="https://testsigma.com/blog/the-different-software-testing-types-explained/" target="_blank" rel="noreferrer noopener">testing types</a>. For example, a video streaming service may need to test against high network throughput, while a financial trading platform may need to test against low latency.</li><li><strong>Understand the end-to-end flow of the application</strong>: This is essential to get an accurate picture of overall performance. This will help ensure no bottlenecks or disconnects along the way.</li><li><strong>Remember the underlying technology</strong>: API performance testing can reveal issues with underlying technologies, such as hardware or software, that could affect performance. For example, if an API is running on a server with outdated hardware, it could cause slowdowns or crashes in the API.</li><li><strong>Test in different conditions</strong>: It&#8217;s essential to test under various conditions, including network conditions (e.g., WiFi vs. cellular), device settings (e.g., tablet vs. desktop), and time of day (e.g., peak vs. off-peak).</li></ol>



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<h2 class="wp-block-heading" id="h-conclusion"><span id="Conclusion"><strong>Conclusion</strong></span></h2>



<p>API performance testing allows developers to ensure that their APIs can handle the load and are reliable and secure. Testers and developers can create an effective API performance testing plan by following the steps outlined in this guide. With a well-designed testing plan, developers can ensure that their APIs are performing to their best potential. This provides a great user experience.</p>



<h2 class="wp-block-heading" id="h-frequently-asked-questions"><span id="Frequently_Asked_Questions"><strong>Frequently Asked Questions</strong></span></h2>



<h3 class="wp-block-heading" id="h-which-tool-is-best-for-api-performance-testing"><span id="Which_tool_is_best_for_API_performance_testing">Which tool is best for API performance testing?</span></h3>



<p>Various tools are available for API performance testing, and the best tool for you will depend on your specific needs, expertise, and budget. The most popular tools include Postman, LoadRunner, SoapUI, and Apache JMeter.</p>



<h3 class="wp-block-heading" id="h-what-is-the-difference-between-api-load-testing-and-performance-testing"><span id="What_is_the_difference_between_API_load_testing_and_performance_testing">What is the difference between API load testing and <a href="https://testsigma.com/blog/performance-testing/" target="_blank" rel="noreferrer noopener">performance testing</a>?</span></h3>



<p>API load testing focuses on testing the performance of the API under varying levels of load, while performance testing focuses on ensuring the application meets specific performance criteria.</p>



<h3 class="wp-block-heading" id="h-how-do-i-test-rest-api-performance"><span id="How_do_I_test_REST_API_performance">How do I test REST API performance?</span></h3>



<p>Testing REST API performance involves several steps, including: </p>



<p>1. Identify Performance Metrics </p>



<p>2. Choose a Testing Tool </p>



<p>3. Define a <a href="https://testsigma.com/guides/test-planning/" target="_blank" rel="noreferrer noopener">Test Plan </a></p>



<p>4. Set Up <a href="https://testsigma.com/blog/test-environment/" target="_blank" rel="noreferrer noopener">Test Environment </a></p>



<p>5. Execute <a href="https://testsigma.com/guides/what-is-test-case/" target="_blank" rel="noreferrer noopener">Test Cases </a></p>



<p>6. Analyze Results </p>



<p>7. Optimize Performance</p>


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