Capstone Project Defense Questions, Mapped to How You Are Graded
Capstone project defense questions for US engineering, public health and data science capstones, tied to ABET and CEPH criteria, with a 15-minute plan and answer frame.
Capstone project defense questions test whether your team solved a real problem well, under real limits. Expect judges and faculty to ask what need you met, which constraints shaped your design, how you know it works, what the sponsor or partner gets, and what you personally did. The quickest way to predict them is to read what your program is graded against.
This guide is for US undergraduate and Master’s capstones, such as engineering senior design, MPH capstones and data science capstones. It builds the questions from the accreditation criteria behind those programs, then gives you a timed plan. Your own syllabus and rubric come first, so check them alongside it.
What a capstone defense looks like at US programs
A capstone defense can be shorter and more public than a thesis defense, and three of the four examples below are team events. They show how different the format can be.
| Program | Format | What the source says |
|---|---|---|
| Georgia Tech Capstone Design Expo | Team presents to judges and visitors | Each team gets 4 to 5 judges, drawn from “industry experts, alumni, faculty, and sponsors” |
| Johns Hopkins MPH capstone | Talk after an adviser-approved paper | “a 10-minute presentation followed by 5 minutes of discussion” |
| UC Berkeley MIDS capstone | Team presentation and web deliverable | Teams “deliver compelling presentations along with a web-based final deliverable” |
| Penn State Learning Factory | Engineering teams with a client | “Teams of engineering students tackle real-world problems sponsored by clients” |
Georgia Tech’s Expo page says teams also upload a poster and a 4 to 6 minute video, and that section instructors set the grading requirements. At Johns Hopkins, “Students may not participate in the oral presentation unless the final paper is submitted on time.” Read your own schedule for rules like these, because they change what you must bring.
Capstone project defense questions built from the grading criteria
Your program’s accreditation criteria tell you what faculty must check, so they are a strong guide to the questions. Turn each criterion into the questions a judge would ask to test it.
Engineering senior design (ABET)
ABET’s Criteria for Accrediting Engineering Programs, 2026-2027 require “a culminating major engineering design experience”. It must incorporate “appropriate engineering standards and multiple constraints” and build on earlier coursework. Its student outcomes add design for “public health, safety, and welfare”, ethics and teamwork.
Standards and constraints
- Which engineering standards or codes apply to your design, and where does your design meet them?
- What were your three hardest constraints, such as cost, weight, power or time?
- Which constraint forced the biggest trade-off, and what did you give up?
Need and requirements
- What did the sponsor actually need, and how did you turn that into measurable requirements?
- Which requirement did you not fully meet, and why?
Safety, society and cost
- What could go wrong for a user, and what did you do about it?
- What environmental or economic factors shaped your choice of materials or process?
- Who else is affected by your design besides the sponsor?
Ethics and teamwork
- Did you face an ethical or professional choice during the project? How did you decide?
- How did the team set goals and split tasks, and what happened when a task slipped?
For component-level questions on software and hardware builds, see our guide to project viva questions. It groups them by project type, so this guide does not repeat them.
MPH and public health capstones (CEPH)
The Council on Education for Public Health’s 2024 Accreditation Criteria, criterion D7, require an integrative learning experience near the end of the MPH. It must draw on more than one foundational competency and more than one concentration competency. The student produces “a high-quality written product”, and CEPH says a poster alone does not qualify.
- Which competencies did this project pull together, and where does the paper show each one?
- Who is the partner organization, and how will it use your product?
- What public health problem does this address, and for which population?
- What data or evidence did you use, and what are its limits?
- What would you recommend the partner do first, and what would it cost them?
CEPH lists products such as a program evaluation report, a training manual and a policy statement. It adds that they should ideally be useful to external partners, such as nonprofit or governmental organizations. Expect questions about that real-world use.
Data science and professional Master’s capstones
Berkeley’s MIDS program asks teams to present and to ship a deliverable people can use. The questions follow from that.
- Who is the user, and what decision does your product help them make?
- Where did the data come from, and what is wrong with it?
- Why this model or method over a simpler baseline? How much better is it?
- How would someone else run or maintain this after you graduate?
- What did you choose not to build, and why?
Questions from sponsors and expo judges
Sponsors and expo judges care about use and value more than method. Georgia Tech’s Capstone Design site says teams “display and pitch their inventions and marketability to a panel of judges”.
- What would it take to move this from prototype to real use?
- What does it cost compared with what we use now?
- Who would buy it or adopt it?
- What intellectual property, if any, does it involve? Check your program’s agreement before you answer, as Penn State’s Learning Factory capstone page links to IP and NDA forms for its sponsored projects.
- If we gave you six more months, what would you do first?
If judges move between teams at an expo, lead with the problem and the result. Keep the method for follow-up questions.
Answering for your part of a team capstone
In a team capstone, expect at least one question about your own contribution. CEPH says a group-based experience must still allow “individualized assessment of outcomes”, and ABET lists teamwork as a student outcome.
Agree before the day who answers which topic, so the team does not talk over itself. Every member should still be able to explain the whole project in two sentences. The project viva questions guide has a three-line contribution statement you can fill in.
A 15-minute capstone defense plan
If your format is a 10-minute talk plus 5 minutes of questions, like the Johns Hopkins MPH example, plan every minute. The split below is an illustration to adapt, not a rule from any program.
| Minutes | What you cover | Question it heads off |
|---|---|---|
| 0 to 1 | The problem and who has it | “Why does this matter?” |
| 1 to 3 | The need, turned into requirements or aims | “How did you define success?” |
| 3 to 6 | Your design or method, and the main trade-off | “Why this approach?” |
| 6 to 8 | Results against each requirement | “How do you know it works?” |
| 8 to 9 | Limits and what the partner should do next | “What would you change?” |
| 9 to 10 | One-slide summary | (sets up questions) |
| 10 to 15 | Questions |
For slide-level detail on a longer talk, see our guide to the dissertation defense presentation. Much of its structure scales down to a capstone.
An answer frame: constraint, choice, evidence
Several of the questions above ask why you made a choice. Answer in three short moves: name the constraint, state the choice, then point to the evidence.
For example, a team that built a low-cost water filter might be asked why it chose ceramic over a membrane. A strong answer could be: “Our sponsor’s limit was 20 dollars a unit. A ceramic filter fit that budget, and our tests in section 4 met the flow-rate requirement.” That example is invented to show the pattern, so swap in your own constraint and results.
Keep each answer under a minute, then stop. If the judge wants more, they will ask, and the follow-up is your chance to show how well you understand the work.
Capstone defense versus dissertation defense
A capstone defense judges an applied project, sometimes by a team, against the program’s criteria. A dissertation defense examines an individual’s original research before a committee, and it can be longer. If you are moving on to a thesis, see our guide to dissertation defense questions.
In Canada, the word is spelled “defence”. Search for both spellings when you look up a Canadian program’s guidelines.
What Thesisroom does with this
If your capstone has a written product, such as an MPH capstone paper or a project report, Thesisroom’s Defense Practice writes questions a committee could ask. Each question is tied to a specific passage or page of your own document. It offers three styles: Practice, Rapid round and Mock panel.
You answer in writing or out loud, and Defense Practice does not write answers or scripts. For a build-only capstone with little writing, the question lists above do the same job by hand.
Frequently asked questions
What questions are asked in a capstone project defense?
Expect questions on the need you met, the constraints that shaped your design, how you tested it, what the sponsor or partner gets, and your own role in the team. Engineering programs add standards and safety, and MPH programs add the competencies your paper shows.
How long is a capstone presentation?
It depends on the program. The Johns Hopkins MPH capstone is a 10-minute presentation followed by 5 minutes of discussion. Georgia Tech’s Expo asks for a 4 to 6 minute video alongside the live presentation. Check your own syllabus.
Who judges a capstone defense?
It varies. At Georgia Tech’s Capstone Design Expo, each team gets 4 to 5 judges drawn from industry experts, alumni, faculty and sponsors. CEPH requires at least one faculty member to review each MPH student’s integrative learning experience.
Can a capstone be a group project?
Yes, in the programs checked here. CEPH says the MPH integrative learning experience may be group-based or individual, as long as each student can be assessed individually. Georgia Tech, Penn State and Berkeley MIDS capstones are team projects.
Is a poster enough for an MPH capstone?
Not under CEPH criterion D7. CEPH says a poster presentation is not an acceptable high-quality written product. You can still present a poster if your program asks for one, alongside the written product.
How is a capstone defense different from a thesis defense?
In the examples here, a capstone judges an applied project, sometimes a team’s, against criteria set by the program. A thesis or dissertation defense examines one person’s research in more depth. Our guide to dissertation defense questions covers the thesis side.
Sources
- Georgia Tech Capstone Design Expo: Student information
- Georgia Tech Capstone Design: home page
- Johns Hopkins Bloomberg School of Public Health: MPH capstone schedule
- UC Berkeley School of Information: MIDS capstone project
- Penn State Learning Factory: LF Capstone
- ABET: Criteria for Accrediting Engineering Programs, 2026-2027
- Council on Education for Public Health: 2024 Accreditation Criteria
How this guide was made: Thesisroom drafted this guide with the help of AI writing tools, then checked every fact, figure and source by hand against the references linked above.