Difference Between Scope, Limitations and Delimitations in Research

If you've recently started planning your dissertation, you've probably come across terms such as scope, delimitations, and limitations.

These concepts can seem confusing at first as they all relate to the boundaries of a research project, and they are often discussed together. In reality, scope, delimitations, and limitations each serve a different purpose.

The key to designing a successful dissertation (or any research paper and PhD thesis), is understanding what each of the concepts above entails. You’ll be able to explain your research decisions more clearly, and you'll avoid choosing a project that is simply too large to complete within the time you have available.

In this guide, we'll explain what scope, delimitations, and limitations mean, how they differ, where they should appear in a dissertation, and how you can apply them to your own research project.

Scope, Delimitations and Limitations of a Study: Why the Confusion?

Scope, limitations and delimitations are concepts that involve setting boundaries around a study. And that’s where the confusion typically stems from.

When you're planning a dissertation or a research paper, you're constantly making decisions about what to include and what to leave out. You might decide to focus on a particular group of participants, investigate a specific time period, or use one research method instead of another.

At the same time, you'll also face constraints that are beyond your control. You may have limited access to participants, restricted time for data collection, or difficulties obtaining certain information.

All of these factors affect your project, but they don't all fall into the same category.

In short:

Imagine you're studying history and decide you want to investigate the impact of the Industrial Revolution on British society. It's an important topic, but it is also enormous: would you focus on working conditions, urbanisation, education, family life, public health, or political reform? Would you investigate Britain as a whole or focus on a particular city?

Very quickly, you realise that a project which initially seemed manageable could become huge!

This is exactly where scope, delimitations, and limitations become useful.

What Is Scope in Research?

The scope of research refers to the overall boundaries of your study. It explains exactly what your dissertation will investigate and, just as importantly, what it will not investigate.

When your supervisor asks about the scope of your project, they are essentially asking:

"What are you planning to study, and where does the project begin and end?"

Every dissertation needs a clearly defined scope. Without one, your topic can quickly become too broad, making it difficult to complete the research within the time and word-count limits of an undergraduate degree.

Your scope may include:

Example of Scope of a Study

As you can see, the second topic is not necessarily less interesting than the first. In fact, it is likely to produce stronger research because it focuses on a specific issue, location, and timeframe.

This is exactly what defining your scope is designed to achieve. Rather than trying to investigate everything, you are creating clear boundaries that allow you to explore one area in greater depth.

Why Defining Your Scope Early Matters

A clear scope helps you:

What Are Delimitations in Research?

If scope defines the overall boundaries of your study, delimitations are the specific choices you make when designing your research project.

These choices are entirely intentional. They are not weaknesses or problems with your study, but they help ensure that your dissertation remains realistic and achievable within the available time and resources.

As a result, you need to make decisions about what to include and what to leave out. These decisions become your delimitations.

For example, depending on your topic, you might choose to:

Example of Delimitations in a Quantitative Dissertation

Imagine you are studying the relationship between sleep quality and academic performance among university students.

You could investigate students from multiple universities, include both undergraduate and postgraduate students, examine different countries, or collect data over several years. For an undergraduate dissertation, this would quickly become difficult to manage.

The table below shows how delimitations might help narrow your project.

Note: none of these choices can be considered a limitation. They are deliberate decisions made by the researcher.

Delimitations vs Scope in Research

So in some ways, scope and delimitations of a study can overlap. A useful way to think about the difference is that scope describes the overall boundaries of the project, while delimitations explain the specific decisions used to create those boundaries.

The scope tells readers what the study covers. The delimitations explain how and why the study has been narrowed.

What Are Limitations in Research?

Limitations are the factors that may affect your research findings but are often outside your control. Every dissertation has limitations, regardless of how well it is planned. And that’s the reason why limitations do not indicate poor research.

On the contrary, identifying limitations demonstrates critical thinking and shows that you understand the strengths and weaknesses of your study.

Common research limitations include:

Example of Limitations in a Qualitative Dissertation

Imagine you are conducting a qualitative archaeology dissertation exploring how Roman Britain is presented to visitors at heritage sites in southern England.
To investigate this, you conduct interviews with site managers and analyse information panels, museum displays, and visitor materials at several Roman archaeological sites.

While this approach allows you to gather detailed insights, it may also create several limitations

These limitations do not mean the study is flawed. Instead, they help readers understand the context of the research and how the findings should be interpreted

Delimitations vs Limitations in Research

This is one of the most common areas of confusion for dissertation students.

A simple way to remember the difference is to ask yourself: Was this my choice? If the answer is yes, it is probably a delimitation. If the answer is no, it is probably a limitation.

Scope vs Limitations vs Delimitations: Key Differences

Now that we've looked at each concept individually, let's compare them side by side.

Although scope, delimitations and limitations are often discussed together, they serve different purposes within a research project. Understanding the distinction can help you explain your methodology more clearly and avoid one of the most common mistakes students make: using the terms interchangeably.

Where Should You Include the Scope, Delimitations and Limitations of Your Research?

Now the differences between scope, limitations and delimitations of research should be clear enough. But where should you discuss them in your dissertation?

The exact structure will vary depending on your university, department and subject area, but these concepts are typically introduced in different sections of the dissertation.

The scope of your study is usually introduced early in the dissertation.
Typically, you should discuss the scope of a study at the very beginning - in the introduction - when explaining your research topic and objectives. This helps readers understand from the outset what the study will focus on and where its boundaries lie.

Delimitations are most commonly discussed in the methodology chapter.
This is because delimitations are closely linked to research design decisions. When explaining your methods, you may need to justify why you selected a particular participant group, location, timeframe, or data collection method.

Limitations are often discussed towards the end of the dissertation.
You could include a dedicated limitations section within the discussion or conclusion chapter. Or you can also address limitations while evaluating findings and reflecting on the research process as a whole. This is your opportunity to acknowledge any factors that may have influenced the results.

How to Write Scope, Limitations and Delimitations of a Study

Once you understand the differences between these concepts, writing about them becomes much easier.

Discussing the scope of your study

Focus on explaining what your research covers. Clearly identify the dissertation topic you chose, population, location, timeframe, or variables being investigated. Readers should be able to understand exactly where the boundaries of your study lie.

Discussing delimitations

Explain the choices you made to narrow the project. This may include decisions about participant selection, geographical focus, data collection methods, or theoretical frameworks. Most importantly, explain why these decisions were made and how they support your research objectives.

Discussing limitations

Be honest about the constraints that may have affected your findings. Rather than treating limitations as flaws, present them as factors that readers should consider when interpreting your results. Remember that no dissertation is perfect. Examiners do not expect a study without limitations. Instead, they expect you to recognise and discuss them appropriately.

Conclusion

Scope, delimitations, and limitations are closely connected, but they are not the same thing.

The scope of your study defines its overall boundaries and helps establish exactly what your research will investigate. Delimitations are the deliberate choices you make to keep the project focused and manageable. Limitations are the constraints that may affect the research process or findings, often despite your best efforts.

Whether you're writing a dissertation, research paper, or PhD thesis, always take the time to consider these concepts early in the research process. Understanding the delimitations, the scope and limitations of research helps ensure that your dissertation remains focused and realistic.

Frequently Asked Questions

Can my scope change during the dissertation process?

Absolutely. Many of the students we work with refine their scope after conducting their literature review or beginning data collection. However, significant changes should usually be discussed with your supervisor to ensure the project remains aligned with its original objectives.

Are delimitations considered weaknesses in research?

No, delimitations are not considered weaknesses. They are deliberate decisions made by the researcher to keep a project focused and manageable. Unlike limitations, they are not weaknesses but part of the research design.

Should I mention limitations in my dissertation proposal?

Yes. Identifying potential limitations early demonstrates that you have thought critically about the feasibility of your project and any challenges you may encounter during the research process.

Do undergraduate dissertations need a limitations section?

Many universities expect students to discuss limitations somewhere in the dissertation, usually in the discussion or conclusion chapter. Check your departmental guidelines, but most undergraduate projects benefit from acknowledging limitations explicitly.