Heuristic Evaluation of a Milkshake Construction Screen Design

This report presents a heuristic evaluation of a milkshake construction screen designed for a vending machine, based on the assignment brief from CMPT 381. The evaluation employs Nielsen and Molich's 10 UI design heuristics to assess the interface's usability. The analysis covers aspects such as visibility of system status, user control, consistency, error prevention, flexibility, real-world behavior, minimalist design, error message display, process recognition, and documentation. The report identifies strengths, such as the consistent look and flexible design elements, and weaknesses, including the lack of error messages and system status visibility. The conclusion emphasizes the importance of heuristic evaluation in UI design and suggests improvements to enhance user experience, highlighting that while the design adheres to some usability principles, it requires further refinement to meet all requirements for optimal user interaction. The report emphasizes the benefits of this evaluation process and highlights the importance of usability.

HEURISTIC EVALUATION OF THE DESIGN
Heuristic evaluation is a part of an iterative design process for findings usability problems in a user
interface design as a usability engineering method addressable and solvable them. The evaluation
involves recognized usability principles for making a UI design that made by a small set of expert
evaluators who examine the interface. This process helps to prevent the failure of the project.
Basically, it is difficult, expensive and time-consuming to check the usability issue of a website.
Sometimes the developer ignores the evaluation process to evaluate the design. If any design of
any interface it is suffering from usability issues. Heuristic evaluation is one of the methods of
“discount usability engineering methods”. In a heuristic evaluation, evaluators evaluate a designed
interface through the set of principles. Evaluators produce their report after discussed a list of
usability problems to address their causes. Heuristic evaluation evaluators can supplements sets of
general design with an additional heuristic that matches the product. Generally, many issues found
recommended has been able to discover approximately 75% of all usability issues. Many
companies conduct own evaluators to evaluate their own code.
In this article, our design of the vending machine is evaluated by 10 UI design heuristics
of Nielsen and Molich’s.
Visibility of system status
It is must highly visible status displayed on the screen within the use of UI. You should
always be informed of system operations with easy to understand. This design cannot use the
functionality for visible the information that how can use the machine. It also not showing that the
specification of the milkshake.
Free user control
Users are mostly acceptable in digital space where backwardness is possible. In our design
use the proper navigation for utilized the backward system. It is possible through the arrow is
shown in the Interface.

Consistency
A consistent look of a User Interface is a must to follow when you design a UI. Designers
should ensure that they maintained similar platforms with graphic elements. You could not use a
graphical representation that functionally and visually work id different. Our design follows a
consistent look. It raises the stander of the design.
Prevent Error
Whenever you think a system design possible keep to minimize potential errors. The user
faces some crucial error of usability. On this occasion be their level of expertise analyze the cause
of the error that achieving error prevention. In this UI design not shown any error of usability the
interface.
Flexible of efficiency
Faster navigation increased the demand of use comes for an interface design with fewer
interactions. This UI design elements are shown properly and work with flexibility. There are also
present another technology to increase the flexibility of the User Interface. This can be achieved
by abbreviations, function keys, hidden commands, and macro facilities.
Behavior as a real world
Designers should remember in the time of Interface design that the UI would find in the
real world based on their target users. Presenting information in a logical order and user’s
expectations derived from the real world. In this design use the proper position of the elements, so
it behaves of the real world.

Minimum clear design
Always design an interface with the necessary resources because the user’s memory always
accrues the relevant information. Therefore, the display must be reduced to only the necessary
components for the current tasks. In this design, there are shown the necessary information. Such
as the price of ice cream and toppings.
Display the error message
Users are unable to understand the technical failure issues. Therefore, the error message
should be always displayed and it would be in plain language and format. In this design, any error
message cannot be displayed. So it is a big usability issue of Interface design pattern.
Process recognition
Tasks maintain by relevant information within the display while the user explores the interface.
Due to the limit of short-time memory, humans give attention on the limited items at one time.
The limitations of short-term memory designers should ensure the user can simply recognize
information instead of recalling. Recognition is always easier than recall the memory.
Documentation
Sometimes many UI designs do not understand by the users. Users want to navigate the
system without having any knowledge of usability. Depending on the type of solution documents
may be necessary or restore the documentation.
According to upper discussions, it is observed that a heuristic evaluation of a user interface
design is important to follow when building an interface design. In this User Interface follow some
of the rules of the proper user design process. So, the application behaves properly. Some of its
functionality is really good but some the main function of usability is missing. It is not a big issue

of making a user interface but if anyone follows this kind of rules the UI makes with the better
usability of user expectation. Nowadays every user design engineer uses this rule of the designing
to make a user interface. Heuristic evaluation is one of the most popular evaluation processes of
any interface design. It includes proper visibility of the design elements, Look is consistent, view
system information, User-friendly, Flexible in use, Upper discussion proves that to build a proper
user interface everybody should follow the proper guidance of the interface design. After building
the user interface it must evaluate the design with the different types of evaluation methods. This
article mainly discusses the heuristic evaluation. This is better from all other evaluation technics.
Our design follows the most part of this evaluation technic approach but it does not fulfill all the
requirements. Nowadays many interface designs evaluate with heuristic evaluation. Heuristic
evaluation is one of the most expensive evaluate technic. This evaluation includes expert evaluator,
designer. This user interface meet this point through this evaluation such as clear design,
User-friendly, element in the proper place, information of elements, flexibility. Assumed the
overall position it is shown that proper evolution is a must for a good user interface design. In this
article discuss the most usable evaluation process that is Heuristic Evaluation