Shadowing Practice: SDLC Vs STLC: Software Development Life Cycle and Software Testing Life Cycle - Learn English Speaking with Video

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Suppose you are assigned a task to develop a custom software for a client.
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Each block below represents a step required to develop the software.
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Irrespective of your technical background, try and make an educated guess about the sequence of steps you will follow to achieve the task.
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The correct sequence would be gather as much information as possible about the details
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and specifications of the desired software from the client.
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This is nothing but the requirements gathering stage.
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Plan the programming language like Java, PHP, .NET, and database like Oracle,
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MySQL, etc. which will best suit the project.
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Also determine high level functions in architecture.
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This is the design stage.
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Actually code the software.
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This is the build stage.
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Next you test the software to verify that it is built as per the specifications given by the client.
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This is the test stage.
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Once your software product is ready, you may do some code changes to accommodate enhancements requested by the client.
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This would be the maintenance stage.
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All these levels constitute the waterfall method of a software development lifecycle.
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As you may observe, testing in the model starts only after implementation is done.
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But if you are working on a large project where the systems are complex, it's easy to miss key details in the requirements phase itself.
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In such cases, an entirely wrong product will be delivered to the client.
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You will have to start afresh with the project.
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Or if you manage to note the requirements correctly but make serious mistakes in design and architecture of your software,
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you will have to redesign the entire software to correct the error.
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Assessments of thousands of projects have shown that defects introduced during requirements
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and design make up close to half of the total number of defects.
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Also, the costs of fixing a defect increases across the development lifecycle.
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The earlier in the lifecycle a defect is detected, the cheaper it is to fix.
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As they say, a stitch in time saves 9.
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To address this concern, the V model of testing was developed.
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For every phase in the development lifecycle, there is a corresponding testing phase.
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The left side of the model is the software development lifecycle, SDLC.
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The right side of the model is the software test lifecycle, STLC.
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The entire figure looks like a V, hence the name V-Model.
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In this figure, you'll find a few stages different from the waterfall method.
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These differences, along with the details of each testing phase, will be discussed in a later tutorial.
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Apart from the V model, there are iterative development models, where development is carried out in phases, with each phase adding a functionality to the software.
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Each phase comprises of its own independent set of development and testing activities.
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Good examples of development life cycles following the iterative method are Rapid Application Development, and Agile Development.
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Before we close this tutorial, here are a few pointers.
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You must note that there are numerous development lifecycle models.
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The development model selected for a project depends on the aims and goals of that project.
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Testing is not a standalone activity, and it has to adapt with the development model chosen for the project.
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In any model, testing should be performed at all levels, right from requirements gathering all the way up to maintenance.
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Speaking Goals for This Clip

This video helps you build fluency in explaining technical processes, a key milestone for clear professional communication. By breaking down SDLC and STLC, it trains you to organize complex ideas into logical sequences—critical for discussions in tech, project management, or academic settings. Practicing this dialogue also strengthens your ability to use cause-effect and comparison structures, which are essential for persuasive speaking.

Phrase Bank

  • "Irrespective of your technical background"
  • "make an educated guess about the sequence"
  • "address this concern"
  • "comprises of its own independent set of activities"
  • "the costs of fixing a defect increases across the lifecycle"

These phrases are reusable in meetings, presentations, or even casual conversations where you need to clarify processes or justify decisions. They add precision and authority to your speech.

Fix Your Weak Spots

Technical terms like "SDLC," "STLC," and "iterative development" can trip up pronunciation, but the video’s slow, clear delivery makes them easy to mimic. Focus on stressing the correct syllables: SDLC (ess-dee-el-see) and iterative (it-ER-uh-tiv). The dialogue also uses long, complex sentences—practice shadowing them to improve rhythm and pacing. Tools like a shadowing app or site can help you compare your delivery to the speaker’s, identifying gaps in intonation or pauses. This is key for avoiding "shadowspeak," where words blend together indistinctly. By mastering these elements, you’ll not only improve English pronunciation but also sound more confident in professional settings. Remember: shadowing isn’t just about repetition—it’s about matching the speaker’s tone, stress, and flow to sound natural.

¿Qué es la Técnica de Shadowing?

Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.

Técnica de shadowing: lee la guía completa paso a paso →