The gold standard of universal design is a place, product, service or learning experience that more people can use with dignity, understandable choices and dependable support. The design begins with variation in people and circumstances, then checks the actual task. An accessible entrance matters; so does being able to find it, open the door, understand the next step and complete the visit.
This guide connects eduKate’s articles on urban access, usable digital services, classroom environments, assistive technology, assessment and service improvement. It helps parents, students, educators and general readers ask what someone needs to accomplish and which barrier the design can remove.
The worked examples follow a fictional community learning centre called Maple House. Its visitors, layouts, booking screens and test results are invented for teaching. They illustrate a method of inquiry, not a building approval, accessibility certification or claim that one design can meet every person’s needs without further adaptation.
Related reading: The Gold Standard of Education | Learning That Transfers into Life.
Find your next learning step
Choose the route closest to your question, or follow the chapters in order.
- 1. Understand the task and purpose
- 2. Examine people, places and information
- 3. Design usable services and learning
- 4. Test, maintain and transfer
- 5. Explore the connected branches
Full chapter index · Worked repair example · Connected specialist guides
Chapter index
Understand the task and purpose · Chapters 1–3
Examine people, places and information · Chapters 4–6
Design usable services and learning · Chapters 7–9
Test, maintain and transfer · Chapters 10–14
Explore the connected branches · Chapter 15
CHAPTER 1 OF 15 · Understand the task and purpose
1. Start with a person and a complete task
A design problem becomes clearer when the task is specific. A person is trying to book a class, reach a room, understand an explanation or operate a control. Each task has a beginning, decisions along the way and an outcome that should be recognisable.
At Maple House, a visitor wants to attend an evening workshop. The online booking is readable, but the confirmation does not identify which entrance remains open after dark. The physical entrance is usable, yet the information journey has left the visitor uncertain.
A review focused only on the webpage or only on the door could miss that connection. Follow the whole task: discover the workshop, understand its conditions, book, receive confirmation, arrive, enter, participate and leave.
Add relevant variations without assuming that everyone experiences them in the same way. Someone may use a mobility aid, need a different information format, have limited familiarity with the language or be carrying a child. Ask which part of the task changes and why.
The first output can be a short journey account. State what the person is trying to do, what they encounter and what remains uncertain. Avoid diagnosing the person from an observation. The design question concerns the relationship between the task and the conditions provided.
A complete task gives the review a useful boundary. It also prevents a successful component from being mistaken for a successful experience.
CHAPTER 2 OF 15 · Understand the task and purpose
2. Understand the purpose of universal design
The original NC State universal-design principles provide a broad way to examine environments, products and communication. They address equitable participation, different ways of using a design, understandable operation, perceptible information, reduced consequences of mistakes, manageable effort and adequate space.
These are design prompts rather than a promise that one arrangement will suit every individual. Their value is to bring variation into the design conversation early and examine it through actual use. The official resource remains the appropriate place to read the principles and their full wording.
For a Maple House exercise, give students an ordinary registration desk and ask three questions. Who can approach it? How can someone understand what to do? What happens if they make a mistake? Those questions open different parts of the design.
The answer should connect a feature with an effect. A lower writing surface may help with one task while leaving an unclear form unresolved. A clearer form may still be difficult to use if the only available surface is inaccessible to the visitor.
Keep the design account practical. Name the barrier, describe a possible change and identify how you would check it. A principle becomes useful when it supports that reasoning.
The NC State framework informs the subject; the scenarios and review questions in this guide are original teaching examples, not an official evaluation instrument.
Reference reading: NC State: Principles of Universal Design.
CHAPTER 3 OF 15 · Understand the task and purpose
3. Separate accessibility, usability and individual support
Accessibility and usability overlap, but they focus attention on different questions. W3C’s explanation of accessibility, usability and inclusion encourages considering them together when developing digital experiences. A broad statement that a service is easy to use should not conceal barriers encountered by disabled people.
At Maple House, a booking page works comfortably for several visitors using a mouse. That observation does not establish that its controls can be understood and operated through other relevant access methods. The people and conditions included in the test matter.
Individual support remains important. Designing a generally more usable service does not remove the need to discuss a person’s particular access requirements. The better question is how the ordinary route and the support route work together.
Imagine that staff assistance is available, but the only way to request it is an inaccessible form. The support exists in policy while the route to it is broken. Repairing the request channel is part of making the support usable.
Avoid treating a request for support as proof that the person has failed to use the service correctly. Ask what the task requires and what information or access is missing.
For a learning check, write three separate claims: who used the service successfully, which barriers were examined and what support remains available. This is more informative than a single unqualified label saying that the design works for everyone.
Reference reading: W3C WAI: Accessibility, Usability, and Inclusion.
CHAPTER 4 OF 15 · Examine people, places and information
4. Learn from people without making them carry the whole repair
People who use a service can identify barriers that a designer has overlooked. Their participation should be respectful, appropriately supported and connected to a decision. Asking for feedback without a route to action can become another burden.
Begin with consent and a clear purpose. Explain the task being examined, what will be recorded and how the information will be used. Collect only what the review needs. A design investigation rarely needs an unnecessary account of someone’s private history.
At Maple House, a participant explains that the room signs are difficult to find from a seated viewpoint. The team records the location and task, then compares the sign arrangement. It does not assume that this one account represents every wheelchair user.
Listen to the person’s own explanation. An observer may see a pause and infer confusion, while the participant may be checking a detail, resting or making a choice. Ask rather than silently assigning a cause.
The organisation still owns the repair. A participant can offer evidence without being expected to design the solution, test every later version or repeatedly justify the same need.
Close the loop with an understandable account of the response. State what changed, what remains unresolved and how a person can raise a continuing barrier. That follow-through makes consultation part of improvement rather than a photograph of participation.
CHAPTER 5 OF 15 · Examine people, places and information
5. Keep physical access continuous
Physical access involves connected spaces and activities. An entrance, path, waiting area, counter, room and exit form a journey. A useful review follows the transitions between them.
At fictional Maple House, a step-free route reaches the main door. Temporary furniture narrows the route on workshop evenings, when attendance is highest. The design on the floor plan and the operating condition are different pieces of evidence.
Ask what must remain available during use. A route needs a maintained connection, understandable direction and an arrangement that fits the relevant activity. The specific technical dimensions and applicable requirements belong to current professional and authority guidance for the real setting.
For a school exercise, use a paper plan with invented obstacles. Ask students to trace a journey and identify where the continuity breaks. They can compare a layout change with an operating change, such as keeping the designated area clear.
Do not turn the exercise into an unsupervised inspection of hazardous or restricted places. The learning task is to reason about an ordinary journey from suitable information.
A completed route should be checked in the conditions that matter. A quiet daytime walkthrough does not establish how a crowded evening event will work. The review should state what was observed and which conditions still need examination.
The urban-access branches below develop the same connection across crossings, transport stops, stations and pickup points.
A product example makes the same point at a smaller scale. Students compare paper mock-ups of a workshop tool’s handle with several invented user descriptions. They are told that the average hand width in the small fictional group is eighty millimetres. That mean does not establish that one handle will fit every person or that hand width alone determines successful use.
The task also involves grip, movement, duration and the intended action. Ask which additional relationships a prototype would need to examine. A larger handle is not automatically the answer to every difficulty, just as a larger room does not automatically produce a continuous route.
Keep the activity at the level of safe paper models and discussion. Its purpose is to separate an average measurement from evidence of fit. The focused Design and Technology article below develops this distinction. A learner demonstrates understanding when they can explain why the number is relevant but insufficient.
CHAPTER 6 OF 15 · Examine people, places and information
6. Make information available when a decision is needed
Information works when a person can find it, understand it and act on it at the relevant moment. A sign after a junction cannot help someone choose at that junction. A confirmation message that omits the next step leaves a completed action uncertain.
Maple House’s fictional visitor receives a message saying that the booking was processed. It does not say whether a place is confirmed or whether another action is required. The phrase sounds complete while leaving the important state unclear.
Rewrite the message around the decision. State the confirmed status, any necessary next action and where the person can find the relevant details. Use language appropriate to the audience and avoid unexplained internal codes.
Different formats may be needed for different circumstances. The important question is whether they convey the information required for the task. An alternative should preserve the relevant meaning rather than merely duplicate part of the content.
For practice, give students three points in the visit: before leaving home, at the entrance and at the room junction. Ask which information belongs at each point. They should explain the timing, not just produce more signs.
Then remove one item and ask what becomes uncertain. This reveals why a short, well-placed explanation can be more useful than a large amount of information in the wrong place.
The accessible-signage, service-notification and presentation guides provide more focused routes into this work.
Information can also be present but difficult to distinguish from its immediate background. Checking Local Text Contrast When an Average Background Hides the Problem uses original broad-patch examples to compare local text contrast with misleading averages, then checks changed foregrounds, crops and evidence.
CHAPTER 7 OF 15 · Design usable services and learning
7. Make controls understandable and feedback useful
A control should communicate what action it performs and what follows from using it. A label, a state and a result belong together. If the person cannot tell whether an action succeeded, the interface has left part of the task unfinished.
At Maple House, a fictional kiosk has two controls marked Continue and Finish. Visitors use Finish expecting to submit the booking, but it closes the session without submission. The issue is the relationship between the label, the expected task and the actual action.
A review should examine that relationship before blaming visitors for choosing incorrectly. A revised design might clarify the action and provide a review stage. The appropriate solution needs testing within the complete service.
Feedback also matters after a mistake. If a form says invalid entry without identifying the field or explaining the required correction, the person has little useful information. A clearer response connects the problem to a recoverable next step.
For an original paper prototype, give students a booking card with a missing date. Ask them to write feedback that helps someone correct the date while preserving the rest of the work. Then ask another learner to follow the instruction.
This exercise assesses explanation and recovery, rather than technical implementation. A real digital service also needs appropriate accessibility and security evaluation; a clear label alone does not establish either.
Control usability also depends on the actual activation regions and their neighbours. Checking Small Pointer Targets by Their Centres and Neighbours works through original circle and rectangle geometry for the target-spacing construction, including long thin controls, changed layouts and evidence limits.
CHAPTER 8 OF 15 · Design usable services and learning
8. Preserve choice without making every task more complicated
Offering alternatives can remove a barrier, but more options do not automatically create a better experience. The choices need understandable differences and a dependable path to the intended result.
Suppose Maple House offers online, telephone and in-person booking. That range can help visitors choose a usable channel. Yet the channels disagree about available places because their records are not coordinated. The alternative routes have created uncertainty at the outcome.
A useful comparison asks what must remain equivalent. The interface need not look identical, but the visitor should be able to understand the same relevant conditions and receive an accountable booking result.
Choice should also respect the person. Requiring someone to disclose more private information merely to use an alternative channel can create an additional barrier. Ask which information is necessary for the task and explain its purpose.
For a learning exercise, map two fictional booking routes. Mark the points where they read or update the same record. Then ask how a change in one route reaches the other. This connects inclusive service with reliable operations.
A good alternative is not simply another button. It is another usable way to complete the task, with the relevant conditions preserved.
When an option has a limitation, make it visible before the person commits. Clear conditions support an informed choice and reduce avoidable repetition.
For a detailed worked route, read The Gold Standard of Universal Design | Resolving Conflicting Access Needs in Shared Learning Spaces.
CHAPTER 9 OF 15 · Design usable services and learning
9. Connect learning access with the knowledge being taught
Universal Design for Learning is an educational framework developed by CAST. Its guidelines address engagement, representation, and action and expression. It concerns how learning goals, materials, methods and assessment can be designed with learner variation in mind.
The learning goal still needs to be clear. If Maple House teaches the relationship between distance, time and speed, the teacher should identify which part of the task demonstrates that understanding. A barrier in the presentation should not be confused with a gap in the concept.
Consider a fictional worksheet whose dense layout makes the question difficult to follow. The teacher improves spacing, explains symbols and provides an appropriate way to examine the relationship. Those changes can make the task more approachable without changing the mathematical claim.
Now consider an assessment specifically examining a particular written skill. The method of response may be part of the learning goal. Decisions about alternatives must therefore preserve what is being assessed and follow the applicable arrangements.
The practical question is precise: which difficulty belongs to the intended learning, and which comes from how the task has been presented or operated? A teacher needs evidence before deciding.
CAST provides the framework; the classroom examples here illustrate an original way to ask that question. The learning-access, assistive-technology and assessment branches below develop the related teaching tasks.
Reference reading: CAST: About Universal Design for Learning.
CHAPTER 10 OF 15 · Test, maintain and transfer
10. Work through a booking-journey repair
Maple House’s fictional review begins with twelve participants attempting the same invented booking task. Nine submit the form, but only six of those nine can correctly explain whether their place is confirmed. A report says the service is 75% successful because nine out of twelve submitted.
That figure answers the submission question. The full task includes understanding the result. Six out of twelve, or 50%, both reach the stated confirmation-understanding outcome in this simplified dataset. The team should not silently substitute one definition of success for the other.
Reviewers examine where the uncertainty appears. The confirmation screen uses a vague status phrase, and the email contains a different phrase. The proposed repair makes the booking state and next step consistent across both messages.
A later invented round includes twelve attempts, with ten people both completing the booking and correctly identifying its state. That is approximately 83.3% for the stated outcome. It is evidence about those attempts, not proof that the service works for every user.
The comparison also needs conditions. Were the task, participants’ starting information and assistance comparable? Was the same review method used? A small before-and-after exercise does not isolate every cause.
The useful result is a transparent account: define the task, identify the barrier, change the relevant relationship and check the outcome again. Preserve the limitations alongside the improvement.
| Invented check | Result | What it establishes |
|---|---|---|
| Initial submission | 9 ÷ 12 = 75% | Form submitted in those attempts |
| Initial full outcome | 6 ÷ 12 = 50% | Booking completed and status understood |
| Later full outcome | 10 ÷ 12 ≈ 83.3% | Stated outcome in the later attempts |
CHAPTER 11 OF 15 · Test, maintain and transfer
11. Test the task and record the conditions
A test should reveal whether the intended activity can be completed under relevant conditions. Begin with a task and a question, then choose an appropriate method. A list of features is useful only when it connects to actual use.
For Maple House, a task might ask a participant to find a workshop, understand its conditions and establish whether they have booked it. The observer records the outcome, difficulties and assistance. The participant can explain what they understood.
Keep assistance visible. A completed task after repeated coaching is different from independent completion. Neither observation should be discarded, but they answer different questions about the service and its support.
An automated tool may identify some digital issues, while human evaluation examines other aspects of the task. W3C’s accessibility resources emphasise the relationship between requirements and people’s actual use. A single method should not be presented as a complete guarantee.
A paper prototype can help test language and sequence. It cannot establish the accessibility of a finished digital implementation or the performance of a physical installation. Match the claim to the method.
For independent practice, give students a fictional test record with an omitted condition. Ask which conclusion becomes uncertain because of that omission. They should identify the missing link rather than simply request more data.
A clear record allows the next reviewer to understand what happened, reproduce a suitable check and recognise when the conditions have changed.
Reference reading: W3C WAI: Introduction to Web Accessibility.
Strong results at individual steps can still involve different successful participants. The worked guide on checking whole-journey access when step-level success rates hide different people follows linked records, assistance, missing results and finite-record bounds.
CHAPTER 12 OF 15 · Test, maintain and transfer
12. Maintain access after the first successful version
A design can become less usable when content, software, furniture, staffing or operating arrangements change. Access needs continuing ownership, especially at the transitions between teams.
At Maple House, a tested booking flow receives a new payment step. The booking confirmation remains clear, but the added step introduces an unresolved action. The earlier test does not automatically cover the changed journey.
For a physical example, a temporary display can occupy space that previously supported an accessible route. The building has not been reconstructed, yet the experience has changed. Operations and maintenance are part of the design’s continuing life.
A useful change record identifies the affected task, the reason for the change and the checks needed before and after release. It should name who can act if the change creates a barrier.
Feedback also needs a maintained route. A person reporting a problem should receive a clear account of what happens next. Requiring the same evidence repeatedly can make the reporting process itself difficult to use.
For learners, compare two invented versions and mark what changed. Ask which earlier conclusions remain supported and which need another check. This develops a more careful understanding of verification.
The aim is dependable continuity. A successful demonstration on opening day is valuable evidence about that day. Continuing service requires attention to the conditions that keep the task usable.
CHAPTER 13 OF 15 · Test, maintain and transfer
13. Choose a learner pathway and transfer the method
The repair pathway begins with one identifiable barrier. A learner might confuse the presence of a feature with completion of a task, or assume that one test represents all users. Use a short scenario and ask for the missing relationship.
The stabilisation pathway changes the setting. A student who can examine a booking screen can next examine a sign sequence or classroom instruction. They should keep the same questions while adapting them to the new task.
The extension pathway introduces several interacting conditions. The learner compares physical access, information, support and operating records. They should explain where the evidence is strong and where another specialist assessment is needed.
Teachers can connect the work with English, Mathematics, Design and Technology, Geography and civic learning. Clear messages support decisions; rates describe defined outcomes; prototypes test relationships; maps show journeys; respectful inquiry keeps people central.
Parents can discuss an ordinary activity without turning a family outing into an audit. Ask what made the task understandable and where a useful explanation was missing. Students can sketch a possible improvement and explain how they would check it.
Progress appears when the learner can define the task, distinguish observation from assumption and choose a meaningful next test. Memorising design vocabulary is a beginning. Applying it with care in a new situation demonstrates transfer.
| Learning route | Starting question | Demonstration of progress |
|---|---|---|
| Repair | Which relationship is misunderstood? | Explain one barrier and a relevant change |
| Stabilisation | Does the method work in another setting? | Adapt the questions to a new task |
| Extension | Which conditions interact? | Compare evidence and identify limits |
Does universal design mean one solution works for everyone?
It means designing with a wider range of people and conditions in view. Further individual support or adaptation can still be necessary. A universal claim needs more evidence than a successful example.
Is an accessible feature enough?
Follow the complete task. A usable entrance can still be difficult to find, and a readable form can still have an unclear outcome. The connections matter.
Is Universal Design for Learning the same framework?
It is a related educational framework developed by CAST, with its own guidelines. This guide distinguishes learning access from physical and service examples while connecting their practical questions.
Should every person use the same channel?
Usable alternatives can help. They need clear conditions and a dependable result rather than forcing everyone through an identical route.
Can a small user test certify the design?
It provides evidence about the participants, tasks and conditions examined. It does not establish complete accessibility or replace the appropriate professional evaluation.
Does removing a barrier mean lowering the learning goal?
Identify the goal and the barrier separately. A change can improve access while preserving the knowledge or skill being assessed. The appropriate arrangement depends on the actual task.
What should I ask after a change?
Ask which part of the journey changed, who may be affected and which earlier checks need to be repeated.
What is the smallest useful next step?
Choose one complete task, describe one observed barrier and identify a check that could show whether a proposed repair helps.
CHAPTER 15 OF 15 · Explore the connected branches
15. Continue into the connected design and access guides
Use the branches below according to the task. Urban-access articles follow physical journeys. Accessible-service articles examine booking, communication and transactions. Learning-access articles connect instruction, materials and assessment. The testing and maintenance articles explain how improvements remain accountable.
The guides serve different levels of detail. A student can begin with a small prototype; an educator may need a clearer learning task; a service team may need a reproducible test or an owned repair process. Choose the route that answers the question in front of you.
Read across the boundaries when a journey requires it. A learning visit can involve a transport stop, an entrance, a digital booking, a document and a classroom activity. One successful part should not hide a barrier in the next.
For independent practice, return to Maple House and choose one task. Write the intended outcome, a specific barrier, a proposed change and the evidence needed to judge it. Then change one condition and explain whether your proposal still holds. That is a useful beginning for design that remains available to more people in daily life.
Physical journeys and public places
- The Gold Standard of Accessible Signage Design Services | Findable Places and Usable Information
- The Gold Standard Of Urban Accessible Drop Off Points
- The Gold Standard Of Urban Accessible Taxi Pickup Points
- The Gold Standard Of Urban Accessible MRT Stations
- The Gold Standard Of Urban Accessible Bus Stops
- The Gold Standard Of Urban Accessible Crossings
- The Gold Standard of a Ministry of Education | School Campus Wayfinding, Room Numbers and Accessible Direction Signs
- The Gold Standard of Teaching Landscape Architecture | Ecology, Access and Designed Outdoor Spaces
- The Gold Standard Of Urban Universal Design
- How a Shopping Centre Works | Accessibility, Family Facilities, Universal Design and Customer Service
- How Singapore Connects | Public Transport Accessibility, Barrier-Free Routes and Priority Travel
Learning materials, assessment and classrooms
- The Gold Standard of Accessible Scientific Diagram Production Services | Explainable Models and Equivalent Science
- The Gold Standard of Accessible Mathematics Content Services | Semantic Equations and Verified Learning
- The Gold Standard of Accessible EPUB Conversion Services | Navigable Books and Verified Reading
- The Gold Standard of Accessible Assessment Design Services | Fair Questions and Usable Feedback
- The Gold Standard of Accessible Presentation Design Services | Navigable Slides and Equivalent Explanations
- The Gold Standard of Accessible E-Learning Production Services | Equivalent Lessons and Usable Assessments
- The Gold Standard of Accessible Document Production Services | Structured Information and Reliable Reading
- The Gold Standard of Digital Accessibility Training Services | Role-Specific Skills and Verified Learning
- The Gold Standard of a Ministry of Education | Classroom Desks, Chairs, Seating Layouts and Inclusive Furniture
- The Gold Standard of a Ministry of Education | Assistive Technology, Accessible Learning and Universal Design
- Ministry of Education V3.0 Reference 92 | Universal Design, Assistive Technology and Learning Access: Teach the Concept, Remove the Barrier
- Ministry of Education V2.0 Reference 10 | How to Build Inclusive Education and Accessibility Assurance
Booking, communication and transactions
- The Gold Standard of Accessible Customer Support Chat Services | Reachable Help and Traceable Resolutions
- The Gold Standard of Accessible Service Notification Services | Understandable Alerts and Recoverable Actions
- The Gold Standard of Accessible Account Recovery Services | Secure Access and Usable Verification
- The Gold Standard of Accessible Payment and Checkout Services | Confirmed Orders and Independent Payments
- The Gold Standard of Accessible Appointment Booking Services | Independent Scheduling and Reliable Confirmation
- The Gold Standard of Accessible Online Form Design Services | Completable Forms and Clear Feedback
- The Gold Standard of Accessible Media Player Integration Services | Usable Controls and Reliable Media Alternatives
- The Gold Standard of Accessible Online Meeting Services | Equal Participation and Dependable Communication
- The Gold Standard of Accessible E-Commerce Services | Fair Choice and Operable Checkout
- The Gold Standard of Accessible Forms Design Services | Completable Journeys and Clear Recovery
- The Gold Standard of Accessible Kiosk Design Services | Independent Access and Reliable Service
Testing, feedback and continuing improvement
- The Gold Standard of Accessible Website Maintenance Services | Sustained Access and Verifiable Fixes
- The Gold Standard of Accessibility Feedback and Complaint Resolution Services | Heard Barriers and Verified Remedies
- The Gold Standard of Accessibility Training and Competency Services | Demonstrated Skills and Reliable Practice
- The Gold Standard of Accessibility Programme Management Services | Owned Responsibilities and Sustained Improvement
- The Gold Standard of Accessibility Statement Management Services | Accurate Claims and Responsive Support
- The Gold Standard of Accessibility Procurement Advisory Services | Clear Requirements and Verifiable Supplier Claims
- The Gold Standard of Accessibility User Research Services | Real Tasks and Respectful Evidence
- The Gold Standard of Accessibility Remediation Services | Fixed Barriers and Verified Outcomes
- The Gold Standard of Digital Accessibility Testing Services | Reproducible Evidence and Practical Remediation
Products, information and related design work
- The Gold Standard of Accessible Dashboard Design Services | Navigable Metrics and Equivalent Decisions
- The Gold Standard of Accessible Interactive Map Services | Findable Places and Equivalent Directions
- The Gold Standard of Accessible Exhibition Interpretation Services | Multiple Ways to Experience Collections
- The Gold Standard of Accessible Data Visualisation Services | Charts with Equivalent Meaning and Trustworthy Decisions
- G2/G3 Design & Technology: Why an Average Hand Measurement Does Not Make a Handle Fit Everyone
- Making Singapore Rich | Accessibility, Assistive Technology and Inclusive Enterprise
Wider subject guides
- The Gold Standard of Design
- The Gold Standard of Urban Systems
- The Gold Standard of Architecture
- The Gold Standard of Education | Learning That Transfers into Life
Sources and scope
The NC State, W3C WAI and CAST resources linked beside the relevant chapters were checked on 21 October 2026 for the identified frameworks and distinctions. Maple House, its visitors, counts, prototypes and learning tasks are original fictional teaching examples. This guide is an educational overview, not a conformance report. Current technical, building, assessment and service requirements should be checked through the responsible official sources and appropriate professionals for a real project.