Incremental development

5 minutes 5 Questions

In TDD, incremental development is an approach where the software is developed and tested in small, incrementally increased functional pieces. This means instead of developing the entire software at once, you build a small feature, test it, make sure it works well, and then move on to develop the n…

A Complete Guide on Incremental Development

What is Incremental Development: Incremental development is a software development process where the product is designed, implemented, and tested incrementally until the product is finished. This process involves both development and maintenance.

Why it's Important: It allows developers to take advantage of what was learned during the development of earlier parts or versions of the system and provides a way for users to gain experience with the system and gives them a chance to make some input into the development.

How it Works: It works by breaking down a large application into smaller chunks. These chunks, or increments, are then developed and delivered individually. This allows for incremental releases, which are easier to manage and control.

Exam Tips: Answering Questions on Incremental development
1. Understand the basics of incremental development.
2. Know the advantages and disadvantages of this approach.
3. Make sure you know how increments are developed and delivered.
4. Familiarize with how the feedback loop works in Incremental Development.
5. Understand the differences between incremental development and other development models.

Remember: Each increment is a complete module of the complete product, so it can be used and tested before moving to the next part.

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PMI-ACP - Incremental development Example Questions

Test your knowledge of Incremental development

Question 1

A mobile app development company chooses an incremental development method. They're struggling to deliver increments as per schedule due to constant changes in user interface (UI). The project manager wants to batch all UI changes for later increments. As an Agile coach, how would you guide them?

Suggest ignoring user feedback related to the UI Implement all UI changes at once and release a final product after extensive testing Approve the plan to batch all UI changes for later increments Propose they consider treating UI updates as part of the incremental improvements, incorporating feedback as they progress, rather than batching for later increments.

Correct Answer: Propose they consider treating UI updates as part of the incremental improvements, incorporating feedback as they progress, rather than batching for later increments.

Principles of Agile include welcoming changing requirements, even if they arrive late in the process, and delivering working software frequently. From this standpoint, the most Agile approach would be to treat UI updates as part of the incremental improvements, incorporating feedback as the project progresses. The option to batch all UI changes for later increments contradicts the Agile philosophy of embracing change, as it would postpone iterations and necessary corrections in favor of maintaining a schedule. Implementing all UI changes at once and releasing a final product after extensive testing also contradicts the iterative, feedback-driven nature of Agile, and suggesting ignoring user feedback related to the UI completely undermines the user-centric focus that is crucial in Agile.

Question 2

A project manager is working on a software development project. They've decided to follow an incremental development approach, but have concerns about delivering tangible results regularly. What would be the best strategy to ensure regular, tangible results?

Hold off on delivering any features until the entire project is complete. Integrate small, independent features in each increment that can be delivered and demonstrated to the stakeholders. Allocate more resources to the project to speed up the development process. Restrict stakeholder communication to minimize distractions. Switch to a different development methodology, such as Waterfall. Focus on delivering a large set of features in the first increment, and worry about regular deliveries later.

Correct Answer: Integrate small, independent features in each increment that can be delivered and demonstrated to the stakeholders.

In an incremental development approach, the focus should be on delivering working software with small, independent features in each increment. This allows the team to make continuous progress and provide regular, tangible results for stakeholder feedback. Other options are not consistent with the goals of incremental development.

Question 3

A company has decided to develop a mobile app using an incremental development approach. They have limited resources and would like to make the best use of them. In this scenario, what should be the project manager's priority while planning the app's development?

Focus on low-priority features to ensure an easy development process. Design the entire app before starting any development. Develop multiple app versions concurrently. Identify high-priority features and include them in the first few increments. Gather a list of all the desired features and include them in the first increment. Request additional resources from the company.

Correct Answer: Identify high-priority features and include them in the first few increments.

In an incremental development approach, it is essential to prioritize high-impact features and develop them in the first few increments to provide value quickly. By doing this, the project manager can focus on delivering these first, allowing for continuous improvement and better resource utilization. The other options are not consistent with the best practices of incremental development.

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