DTI XI - FUNDAMENTALS OF USER INTERFACE

 

FUNDAMENTALS OF USER INTERFACE

USER EXPERIENCE AND ERGONOMICS

1. What is User Experience?

User Experience (UX) refers to the overall experience, feelings and perceptions of a user while interacting with a product, service, system or environment.

A designer should not think only about how a product looks. The designer must also consider:

• Is it easy to use?
• Is it comfortable?
• Can the user understand how to use it?
• Does it solve the user's problem?
• Is it safe?
• Does the user enjoy using it?
• Does it meet the user's actual needs?

Therefore:

Good design focuses not only on the product but also on the experience of the person using the product.

 

2. Understanding UX Through an Example

Consider two school bags.

Bag A looks very attractive but:

• has uncomfortable straps,
• is difficult to open,
• has poorly arranged compartments,
• becomes painful to carry.

Bag B has a simple appearance but:

• distributes weight comfortably,
• has padded adjustable straps,
• provides easy access to books,
• has separate compartments,
• is easy to carry.

Although Bag A may be visually more attractive, Bag B may provide a better user experience.

This demonstrates an important principle:

Appearance is only one part of design. The way a user experiences the product is equally important.

 

3. Important Elements of User Experience

A good user experience usually considers several factors.

Usability

Usability refers to how easily and effectively a user can use a product.

For example, the buttons of a school app should be easy to locate and understand.

Accessibility

A design should, where possible, be usable by people with different abilities and requirements.

For example, readable text, sufficient contrast and clearly understandable controls can improve accessibility.

Functionality

The product should perform the function for which it was designed.

A beautiful water bottle that leaks fails its basic function.

Comfort

A product that comes into physical contact with the user should be comfortable to use.

For example, a chair should support an appropriate sitting posture.

Safety

The design should minimise avoidable risks to the user.

For example, a children's product should avoid unnecessarily sharp edges.

Convenience

The product should make the user's task easier rather than unnecessarily complicated.

Emotional Experience

Products can also produce emotional responses.

A user may experience:

satisfaction, confidence, pleasure, frustration, confusion or irritation.

Designers therefore consider both functional and emotional experiences.

 

4. User-Centred Design

User-centred design is an approach in which the needs, abilities, limitations and experiences of users are considered throughout the design process.

Instead of saying:

"I think this product is good."

a designer asks:

"Does the user find this product useful, comfortable and easy to use?"

This is why empathy is important in Design Thinking.

The designer needs to understand the problem from the user's point of view.

 

5. Understanding the User

Before designing, a designer may investigate:

Who is the user?

What does the user need?

What difficulties does the user currently face?

Where will the product be used?

How often will it be used?

What are the user's physical capabilities and limitations?

How does the user currently perform the task?

What does the user like or dislike about existing solutions?

These questions help the designer avoid designing purely on assumptions.

 

6. User Research

User research is the process of gathering information about users, their needs, behaviour and experiences.

Common methods include:

Observation

Watching users perform activities in their natural environment.

Interviews

Talking directly to users about their needs and problems.

Questionnaires/Surveys

Collecting responses from a larger group of users.

User Testing

Allowing users to interact with a prototype and observing what happens.

 

The objective is to identify the difference between:

What the designer assumes users need?

and

What users actually need and experience?

 

7. What is Ergonomics?

Ergonomics is the study of designing products, systems and environments to suit the physical and cognitive capabilities, needs and limitations of people.

In simple words:

Ergonomics means designing things to fit people rather than forcing people to fit the design.

Ergonomics is particularly important when people interact physically with products for long periods.

Examples include:

chairs, desks, keyboards, tools, bags, footwear, vehicles, mobile devices and workspaces.

 

8. Why is Ergonomics Important?

An ergonomically designed product can contribute to:

Comfort – the product feels comfortable during use.

Safety – unnecessary physical risks are reduced.

Efficiency – tasks can be performed more effectively.

Ease of use – interaction requires less unnecessary effort.

Reduced fatigue – appropriate design can reduce physical strain.

Better user experience – users are generally more satisfied with products that suit their needs and capabilities.

 

9. Anthropometry and Ergonomics

A very important concept related to ergonomics is anthropometry.

Anthropometry is the measurement of human body dimensions.

Examples include:

• height
• arm length
• hand size
• shoulder width
• sitting height
• leg length
• reach

Designers use such measurements when determining the dimensions of products and spaces.

Example: Designing a Chair

A designer needs to consider:

seat height,

seat depth,

back support,

width,

armrest position,

and the user's body dimensions.

A chair designed without considering human measurements may be uncomfortable even if it looks attractive.

 

10. One Size Does Not Fit Everyone

Human beings have different:

heights, weights, body proportions, ages, abilities and physical requirements.

Therefore, designing only for one person's measurements may create problems for other users.

One useful solution is adjustability.

Examples:

Adjustable office chair → different users can change its height.

Adjustable school-bag straps → users can change strap length.

Adjustable car seat → users can modify seat position.

Adjustable monitor → users can alter viewing height or angle.

Adjustability helps a design accommodate a wider range of users.

 

11. Physical Ergonomics

Physical ergonomics deals with the relationship between the human body and physical products or environments.

It considers factors such as:

posture, movement, reach, grip, force, repetition, body dimensions and physical comfort.

Example

When designing scissors, the designer should consider:

How does the hand hold them?

Are the finger openings comfortable?

How much force is required?

Can both right- and left-handed users operate them?

Does prolonged use cause discomfort?

 

12. Ergonomics in Everyday Products

School Bag

Consider:

• strap width
• padding
• adjustability
• weight distribution
• accessibility of compartments
• size of handles
• ease of opening

Pen

Consider:

• thickness
• grip
• weight
• surface texture
• pressure required
• comfort during long periods of writing

Water Bottle

Consider:

• grip
• weight
• opening mechanism
• diameter
• ease of cleaning
• possibility of leakage

Mobile Phone

Consider:

• screen size
• button/icon size
• readability
• reach of controls
• weight
• grip
• ease of navigation

 

13. Ergonomics in Workspace Design

Suppose a student spends several hours working at a computer.

The designer should consider the relationship between:

User → Chair → Desk → Keyboard → Mouse → Monitor

For example:

The chair should provide suitable support.

The desk should allow comfortable working.

Frequently used objects should be within convenient reach.

The monitor should be positioned to support comfortable viewing.

The keyboard and mouse should be positioned so that unnecessary strain is minimised.

Thus, ergonomics considers the entire interaction between the user and the environment.

 

14. Posture

Posture refers to the position in which a person holds their body while sitting, standing or performing an activity.

Poorly designed products or environments may encourage awkward postures.

For example:

A screen placed too low may encourage repeated bending of the neck.

A table that is unsuitable for the user may result in uncomfortable arm or shoulder positions.

Therefore, ergonomic design aims to support comfortable and appropriate working postures.

 

15. Biomechanics / Grip

Products held in the hand need careful ergonomic consideration.

Examples include:

pens,

toothbrushes,

tools,

bottles,

sports equipment,

kitchen utensils.

The designer may consider:

size, shape, texture, pressure, weight and possible slipping.

A handle that looks stylish but is difficult to hold may provide poor ergonomics.

 

16. Comfort vs Function

A product needs to perform its function, but functionality alone is not enough.

Consider a chair.

Its basic function is to allow a person to sit.

But if the chair causes discomfort after ten minutes, the design has not adequately considered the user's experience.

Therefore:

Good Design = Function + Usability + Comfort + Safety + User Needs

 

Relationship Between UX and Ergonomics

UX and ergonomics are closely related but are not exactly the same.

User Experience (UX)	Ergonomics
Concerned with the user's overall experience	Concerned with fitting design to human capabilities and limitations
Includes usability, emotions, ease and satisfaction	Includes posture, dimensions, reach, grip, comfort and cognitive demands
Can apply strongly to digital and physical products	Especially important in human-product/environment interaction
Asks: "What is the user's overall experience?"	Asks: "Does the design suit the user?"

 Simple example

Consider a mobile application.

If users cannot understand where to find the Submit button, that is primarily a usability/UX issue.

If the controls are extremely small and difficult to tap comfortably, human factors/ergonomic considerations also become relevant.

The two areas often overlap.

 

Example – Redesigning a School Chair

Suppose students complain that classroom chairs become uncomfortable during long lessons.

Empathise

Observe how students sit and ask about their experience.

Research

Study relevant body dimensions, posture and existing chairs.

Define

Identify specific problems rather than simply saying "the chair is uncomfortable."

Ideate

Develop several alternatives for seat dimensions, back support, materials or other features.

Prototype

Build a model or mock-up.

Test

Allow students to use it and collect feedback.

Iterate

Modify the prototype according to evidence from testing.

This demonstrates how user experience, ergonomics and Design Thinking work together.

 

 

The Fundamentals of UI/UX Design and Process

The process of UI/UX design involves understanding user needs and structuring applications to be both functional and visually appealing. User interface (UI) focuses on the visual presentation, including colors, fonts, and layouts, while user experience (UX) ensures the product is intuitive and solves real problems effectively.

Designers begin by conducting research through surveys and observations to identify target audience preferences and common pain points. Next, they create wireframes and organize information architecture to establish a logical layout and seamless navigation flow.

Following structural planning, visual design elements are applied to create a professional and pleasant aesthetic using calming color schemes and clear typography.

Finally, usability testing allows creators to gather critical feedback from real users, enabling iterative improvements that transform a cluttered concept into a successful, user-friendly application.

Activity:

Watch: https://www.youtube.com/watch?v=ODpB9-MCa5s

Ans the following based on above video:

1. What is the difference between UI (User Interface) and UX (User Experience)? Give an example.
2. Why is it important for a designer to understand users before designing a product or solution?
3. Can a product have an attractive UI but a poor UX? Explain with an example.
4. What is a wireframe, and why is it created before developing the final design.

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1. User-Centred Design (UCD)

User-Centred Design is a design approach in which the needs, problems, abilities and experiences of users are kept at the centre of the entire design process.

Instead of designing according to what the designer personally likes, the designer asks:

• Who will use the product?
• What does the user need?
• What problems does the user face?
• Is the solution easy and comfortable to use?
• What does the user say after testing it?

Example: While designing a school website, students first understand what new students and parents need, create a prototype, test it with them, collect feedback and improve the website.

Easy definition: User-Centred Design means designing with the user's needs and experience as the main focus.

 

2. User Persona

A user persona is a fictional but realistic profile of a typical target user, ideally based on user research.

It helps the designer understand WHO they are designing for.

For example:

Name: Riya
Age: 16
Role: New Class XI student
Goal: Find important school information quickly
Needs: Timetable, notices, events, contact information
Pain Point: Finds complicated websites difficult to navigate
Technology: Mainly uses a mobile phone

Now, while designing, students can ask:

“Will Riya be able to find the timetable easily?”

So a persona prevents designers from designing only according to their own preferences.

Easy definition: A user persona is a representation of a typical user showing their goals, needs, behaviour and problems.

 

3. Storyboard

A storyboard is a sequence of drawings or frames showing how a user experiences a situation or interacts with a product or solution over time.

It is similar to a comic strip.

 For example, for the school website:

Frame 1: Riya joins a new school.
↓
Frame 2: She wants to find her Class XI timetable.
↓
Frame 3: She opens the school website on her phone.
↓
Frame 4: She selects Student Corner.
↓
Frame 5: She selects Timetable.
↓
Frame 6: She finds and downloads her timetable.

 

The storyboard helps the designer visualise the user's experience step by step and identify where the user might face difficulties.

Easy definition: A storyboard is a visual sequence showing the user's experience with a problem, product or solution.

 

Remember the difference

Concept	Main Question
User-Centred Design	HOW should we design? → Keep the user at the centre
User Persona	WHO are we designing for?
Storyboard	HOW does the user's experience unfold step by step?

 

Point to remember:

UCD → Approach
Persona → User
Storyboard → User's experience in sequence

 

Assignment:

1. What is User Experience? Explain with an example.
2. What is ergonomics and why is it important in design?
3. Differentiate between User Experience and ergonomics.
4. What is anthropometry? How does it help a designer?
5. Explain physical ergonomics with suitable examples.
6. What is cognitive ergonomics? Give an example.
7. Why should designers consider different body dimensions while designing products?
8. Explain the role of ergonomics in designing a school chair or school bag.
9. How are usability and ergonomics related to good user experience?
10. Explain how the Design Thinking process can be used to improve the ergonomic design of an everyday product.