{"id":2257,"date":"2019-10-25T11:59:57","date_gmt":"2019-10-25T11:59:57","guid":{"rendered":"https:\/\/www.goodcore.co.uk\/blog\/?p=2257"},"modified":"2025-03-14T10:28:28","modified_gmt":"2025-03-14T10:28:28","slug":"iterative-development","status":"publish","type":"post","link":"https:\/\/www.goodcore.co.uk\/blog\/iterative-development\/","title":{"rendered":"What is Iterative Development? An Easy Guide for Beginners"},"content":{"rendered":"

Starting a new project, especially in software development<\/a>, can feel overwhelming. With so many moving parts and potential challenges, it\u2019s easy to lose direction or get stuck chasing perfection. That\u2019s where having a structured approach, like iterative development, comes in handy.<\/span><\/p>\n

In this guide, we\u2019ll break down the concept of iterative development, focusing on how it can help you stay organised, adapt to changes, and achieve better results over time. This post will provide a clear roadmap for understanding and applying this effective development method. By the end, you\u2019ll see how iterative development can make tackling complex projects feel more achievable. Let\u2019s get started.<\/span><\/p>\n

What is iterative development?<\/strong><\/h2>\n

Iterative development is a step-by-step approach to building and improving projects. Instead of trying to complete everything at once, the work is broken into smaller cycles called “iterations.” Each iteration focuses on planning, creating, testing, and refining a specific part of the project.<\/span><\/p>\n

The key idea is continuous improvement – teams build something, gather feedback, and use it to make the next version better. This approach allows for flexibility, helping teams adapt to changes or fix issues early in the process. Whether you\u2019re developing software, creating a product, or managing a project, iterative development helps you stay focused, efficient, and responsive to feedback.<\/span><\/p>\n

The Origins of Iterative Development<\/span><\/h3>\n

Iterative development traces its roots to the need for efficient and adaptable processes in complex projects. Early examples include NASA and SpaceX, which utilised incremental development and prototype testing to reduce cost overruns in their high-stakes missions. Influenced by concepts like agile methodologies and insights from experts such as Craig Larman, iterative practices became vital in modern product management and software design. Organisations like the Interaction Design Foundation have also emphasised its role in AI for designers, showcasing its adaptability for evolving fields. Iterative development\u2019s focus on refinement and feedback has solidified its importance across industries.<\/span><\/p>\n

What are the different approaches to iterative development?<\/strong><\/h2>\n

Iterative development can be implemented in various ways, each tailored to different project needs and team dynamics. While the core idea of working in cycles remains the same, the specific methods can vary. Here are some popular approaches to iterative development that you can explore:<\/span><\/p>\n

Agile Development<\/span><\/h3>\n

Agile methodology focuses on flexibility and collaboration, using short iterations called “sprints” to deliver small, functional increments of a project. Teams regularly review progress, adapt to changes, and prioritise tasks based on immediate needs. This approach encourages constant feedback and quick adjustments, making it ideal for dynamic projects.<\/span><\/p>\n

Spiral Model<\/span><\/h3>\n

The spiral model combines iterative and risk-driven approaches. Each iteration starts with risk assessment, followed by design, development, and testing. This method is particularly useful for large, complex projects where identifying and managing risks early is critical.<\/span><\/p>\n

Rapid Application Development (RAD)<\/span><\/h3>\n

RAD emphasises speed and user feedback. Teams quickly build prototypes in iterative cycles, allowing stakeholders to review and provide input throughout the process. This approach is best for projects where time-to-market and user satisfaction are top priorities.<\/span><\/p>\n

Prototyping<\/span><\/h3>\n

Prototyping focuses on creating a working model or prototype of the project early in development. This prototype evolves through iterative feedback and improvements, helping teams visualise the final product and address user needs effectively.<\/span><\/p>\n

Each approach has its strengths and fits different project requirements. Understanding these methods can help you choose the one that aligns best with your goals.<\/span><\/p>\n

The difference between iterative and traditional development models<\/strong><\/h2>\n

Iterative development and traditional development (often referred to as the “Waterfall” model) differ significantly in their approach to project execution. Traditional development follows a linear, sequential process, where each phase – such as planning, design, development, testing, and deployment – is completed before moving to the next. This approach relies on extensive upfront planning and assumes that requirements will remain stable throughout the project. While this can work well for predictable, low-risk projects, it often struggles with adapting to changes or incorporating feedback mid-project.<\/span><\/p>\n

On the other hand, iterative development is more flexible and adaptive. It breaks the project into smaller cycles, or iterations, where planning, development, and testing are repeated. This allows teams to gather feedback, adjust requirements, and refine the product continuously. Iterative development is ideal for projects with evolving needs, as it emphasises adaptability and continuous improvement over rigid planning.<\/span><\/p>\n

Here\u2019s a quick comparison:<\/span><\/p>\n\n\n\n\n\n\n\n\n
Aspect<\/b><\/td>\nIterative Development<\/b><\/td>\nTraditional Development<\/b><\/td>\n<\/tr>\n
Process<\/b><\/td>\nCyclical, repetitive iterations<\/span><\/td>\nLinear, sequential phases<\/span><\/td>\n<\/tr>\n
Flexibility<\/b><\/td>\nAdapts to changes easily<\/span><\/td>\nDifficult to adapt after planning<\/span><\/td>\n<\/tr>\n
Feedback Integration<\/b><\/td>\nFrequent, during each iteration<\/span><\/td>\nLimited, typically at the end<\/span><\/td>\n<\/tr>\n
Risk Management<\/b><\/td>\nIdentifies and mitigates risks early<\/span><\/td>\nRisks addressed late in the process<\/span><\/td>\n<\/tr>\n
Ideal For<\/b><\/td>\nDynamic, evolving projects<\/span><\/td>\nStable, predictable projects<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Phases of Iterative Development<\/strong><\/h2>\n

The iterative development process is cyclical; unlike the waterfall model, it does not follow a rigid process. Once you are done with your initial planning, which does not necessarily have to be very well-defined, the rest of the steps for each iteration are carried out again and again with extensive testing in between until you reach the overall deployment stage.<\/p>\n

Each iterative cycle is tested at its initial stage for software and system integration. The decision is made on every step to determine whether the produced outcome will be kept or discarded for the next cycle. This is also referred to as incremental prototyping because the software is developed by working on smaller chunks during each iteration.<\/p>\n

\"sdlc
Iterative Development Model<\/figcaption><\/figure>\n

In other words, this SDLC iterative model allows the developers to access previous cycles which can be reviewed and changed, if necessary, until all the requirements are met and the final product is delivered.<\/span><\/p>\n

Following is the iterative development methodology for each cycle. To make it further easier for you, we will understand the steps with the help of an example:<\/p>\n

Step 1: Planning and Analysis<\/h3>\n

The first step of the iterative life cycle is the planning, where the developers and clients sit together to identify software requirements, business and stakeholders\u2019 requirements. At this stage, it is not necessary to identify risks associated with the project or worry about quality assurance requirements because this step will be repeated for your next iteration which will make sure that the risks are overcome and quality is ensured.<\/p>\n

Once all the requirements are identified, analysis is done to streamline the development process such as identifying database models.<\/p>\n

For your ease, let\u2019s understand through an example.<\/p>\n

\"iterative<\/a>
Iterative Steps – Planning and Analysis<\/figcaption><\/figure>\n

Suppose you want to develop a gaming application in the least possible time. You have to incorporate three requirements for now: the menu page, the game and the scoreboard. Once you are done with your initial planning for each requirement where you will identify overall project requirements, your target audience, the content of the game, client\u2019s requirements, etc. you will start with your first iteration which will focus on the basic template of the menu page, game and scoreboard.<\/span><\/p>\n

Only when you are done with this step, will you proceed to the next one. This is how the iterative methodology works.<\/span><\/p>\n

Step 2: Design<\/h3>\n

In iterative development, the design does not play an important role, compared to other steps. However, in this step, the design team can establish technical requirements such as language, services, data layers and so on, for the architecture of the software.<\/p>\n

\"iterative
Iterative Steps – Design<\/figcaption><\/figure>\n

In the case of our gaming application example, at this step of iterative software development, the design team defines business rules, database along with data layers, languages, etc. Once these definitions have been established, you will develop a basic version of the three features. When you are done with this step, you will proceed to the next one i.e. implementation.<\/span><\/p>\n

Step 3: Implementation<\/h3>\n

Now when you are done with the previous three steps, your next step is to start writing the code for your first version of the software. You will follow the coding guidelines and use various back end and front end technologies<\/span><\/a> such as compilers, interpreters, debuggers, etc. to write the code.<\/p>\n

At this step, you will build the technical architecture as well as the database and programs of your first iteration module.<\/p>\n

Now, keep in mind, sometimes implementation and testing (which I am going to discuss next) are repeated side-by-side to ensure there are no errors left. Hence, if you doubt that you have written some part of the code incorrectly, after testing, you can rewrite your code and proceed to your next iteration.<\/p>\n

\"iterative
Iterative Steps – Implementation<\/figcaption><\/figure>\n

As in the case of our game app example, developers will start writing the code where they will make sure that every guideline from planning to design step is incorporated well. At this point, after developer level testing, if you feel the code is wrong or the software needs an upgrade, you go back to the planning step and start your second iteration.<\/p>\n

Step 4: Testing<\/h3>\n

Once your code is written for your initial iteration module, it is time to test it for potential bugs or issues that might have been overlooked during the implementation step. You will perform unit testing that is testing individual units of codes; integration testing that is verifying units of code functioning properly when integrated; and will run a user acceptance test that is determining whether the system satisfies the user requirements for that iteration.<\/p>\n

Additionally, you will test your iteration module for potential hacks using different methodologies, which are not only limited to black box (having no access to source code), grey box (having partial access to source code) and white box (having full access to source code) methods.<\/p>\n

\"iterative
Iterative Steps – Testing<\/figcaption><\/figure>\n

In the case of our gaming application, once you reach testing, you will test using multiple testing methodologies. One of the most important testing methods is playtesting; you will provide your application to different audiences who will try to test it in different ways. In this case, they will choose the number of players from the menu page and play the game from different devices. If they find any problems, you will have to go back to the planning step and start working on your second iteration.<\/p>\n

Step 5: Evaluation<\/h3>\n

Once all your steps are followed for each iteration, you will finally evaluate the entire project. You will hand over the project to the client, who will review the final product for its efficiency and validity.<\/p>\n

So, according to our example, after testing, your audience or even you as a developer might have faced some issues in terms of functionality, user interface (UI) design, user experience (UI) design, etc. Therefore, at this stage, you will gather feedback and will start your next iteration from the very first step that is the planning.<\/p>\n

Now, this is the first iteration cycle where you have successfully developed the basic version of your gaming application. To incorporate further changes in the final product, for example, to add new game levels, along with the client feedback, you will take your go back to Step 1, that is, planning, and follow every step again for your next iteration cycle, which will be an improved version of your software. The process will repeat until there are no improvements to be made.<\/p>\n

\"iterative
Iterative Steps – Deployment<\/figcaption><\/figure>\n

After you have successfully completed all the iterations, in our case your gaming application, the project is ready to be released. You will provide user documentation to the client where you will specify the guidelines to use the software.<\/p>\n

If the client wishes to use the maintenance facility, you will also provide weekly or monthly maintenance to them.<\/p>\n

Guidelines for Iterative Development Implementation<\/strong><\/h2>\n

Successful implementation of iterative development requires a structured yet flexible approach. By adhering to key practices and leveraging relevant concepts, teams can maximise efficiency and deliver high-quality outcomes. Below are the essential guidelines to follow:<\/span><\/p>\n

    \n
  • Create a detailed software design document:<\/b> clearly outline the functional and non-functional requirements to provide a strong foundation for iterative cycles.<\/span><\/li>\n
  • Adopt adaptive management:<\/b> stay flexible and adjust processes to address changes in requirements or unforeseen challenges during development.<\/span><\/li>\n
  • Focus on business value:<\/b> prioritise features and iterations that deliver the highest business value to stakeholders.<\/span><\/li>\n
  • Practice continuous integration:<\/b> regularly integrate and test code to ensure a stable and working architecture throughout development.<\/span><\/li>\n
  • Foster cross-discipline work<\/b>: encourage collaboration between teams, including developers, designers, and testers, to address diverse project needs like interaction design and technical implementation.<\/span><\/li>\n
  • Use a project control list:<\/b> maintain a dynamic list of tasks and priorities to ensure alignment with the goal-driven software development process.<\/span><\/li>\n
  • Leverage rapid application development:<\/b> employ rapid prototyping techniques to gain early user approval and refine features based on feedback.<\/li>\n<\/ul>\n

    When to Use Iterative Model<\/h2>\n

    Now that we know the science behind the iterative process model, the important question which comes up is when to use it? You will use it when:<\/span><\/p>\n

      \n
    1. A software project is large.<\/span><\/li>\n
    2. The requirements are not well-defined but easy to understand.<\/span><\/li>\n
    3. There is a need to change any requirements in future.<\/span><\/li>\n
    4. The resources for a few iterations are not available at the time of use but can be used in later iterations.<\/span><\/li>\n<\/ol>\n

      Furthermore, to choose the best method for your software, we have listed the pros and cons of the model.<\/span><\/p>\n

      Benefits of the iterative development model<\/span><\/h3>\n
        \n
      • Flexibility and adaptability:<\/b> iterative development allows teams to adapt to changing requirements or new insights without overhauling the entire project. Each iteration can accommodate refinements, making it an excellent choice for projects where requirements are likely to evolve.<\/span><\/li>\n
      • Risk reduction:<\/b> by addressing risks early and throughout the project, this model prevents major issues from arising late in the development process. Frequent testing and feedback loops help identify and resolve problems incrementally, reducing overall risk.<\/span><\/li>\n
      • User involvement:<\/b> regular input from users or stakeholders is integral to the iterative process. This ensures that the product aligns with user expectations and increases the likelihood of stakeholder satisfaction upon completion.<\/span><\/li>\n
      • Improved quality:<\/b> the focus on incremental improvements leads to a polished and well-tested final product. Each cycle refines the output, enhancing both functional and non-functional aspects of the project.<\/span><\/li>\n
      • Faster time-to-market:<\/b> teams can deliver functional components early in the process, even if the full project isn\u2019t complete. This allows organisations to release features to users more quickly and gain early feedback.<\/span><\/li>\n<\/ul>\n

        Drawbacks of the iterative development model<\/span><\/h3>\n
          \n
        • Increased resource demand:<\/b> continuous testing, integration, and updates require substantial human and technical resources. Teams may need additional time and expertise to keep up with the demands of iterative cycles.<\/span><\/li>\n
        • Scope creep:<\/b> the model\u2019s adaptability can lead to uncontrolled expansion of the project\u2019s scope. Without strict management, frequent changes and additions might delay progress and stretch the budget.<\/span><\/li>\n
        • Complex management:<\/b> managing multiple iterations and tracking evolving requirements can be challenging. It requires a robust organizational structure, effective communication, and strong leadership to keep the project on track.<\/span><\/li>\n
        • Potential delays: w<\/b>hile iterative development encourages continuous improvement, the constant feedback and adjustment process can slow down overall progress if not carefully planned and controlled.<\/span><\/li>\n<\/ul>\n

          Conclusion<\/h2>\n

          To sum up what iterative development is, it is simply a software development life cycle model which works through small iterations to ensure efficiency and high-quality software at the end. This model can be a great choice for large software that needs to incorporate feedback and review progressively during development rather than towards the very end. If you follow each step of this model properly, you will end up with a great product that is more likely to be in line with the desired functionality at the end, unlike software developed using the more rigid waterfall model.<\/p>\n

          We hope we were able to answer all your questions regarding the iterative process. If you still have any query, feel free to reach out to us and we will be happy to assist you. And If you are wondering what SDLC methodologies GoodCore uses while developing amazing custom software for clients, reach out to us and we shall let you know!<\/p>\n

          FAQs<\/span><\/h2>\n

          What is iterative development?<\/span><\/h3>\n

          Iterative development is a process where projects are built in small, repeatable cycles or iterations. Each iteration involves planning, building, testing, and refining, allowing teams to improve the product incrementally. This approach helps adapt to changes and gather feedback throughout development.<\/span><\/p>\n

          What are the benefits of using the iterative development model?<\/span><\/h3>\n

          Iterative development offers flexibility, early risk reduction, and continuous user feedback, ensuring the product aligns with user needs. Its incremental approach improves quality and enables faster delivery of functional components. This makes it ideal for dynamic, evolving projects.<\/span><\/p>\n

          How does iterative development differ from the traditional Waterfall model?<\/span><\/h3>\n

          Iterative development is flexible and adaptive, allowing for continuous changes and improvements, unlike the linear and rigid Waterfall model. Waterfall completes phases sequentially, while iterative focuses on repeated cycles to address evolving requirements and reduce risks.<\/span><\/p>\n

          What are the main phases of iterative development?<\/span><\/h3>\n

          The process involves defining goals, developing and testing in iterations, gathering feedback, and refining the product incrementally. Continuous integration and collaboration among team members are essential for maintaining progress and quality.<\/span><\/p>\n