Scenarios are descriptions of one or more users interacting with with a system, device, or process to achieve a goal under specified conditions and constraints. They provide information about the context in which a system has to operate, in a user- and task-oriented way.
Scenarios can be presented as rich narratives (e.g.,an hour or a day in the life of a user) or simple statements describing the triggers and situation that prompts a user to interact with a system. Scenarios sometimes include simple lists of the steps in a task. Scenarios are used in design sessions, walkthroughs, and usability tests to ensure that the system design effectively supports users in a wide range of real-life situations.
They are also known as "task scenarios".
Scenarios and use cases
Scenarios are sometimes called "use cases<". However the term "use case" can be confusing, as it is used with a different meaning in software engineering. One way of illustrating the difference is through the classic example of withdrawing money from a bank.
Use cases will include the functional steps of: requesting the withdrawl, verifying your identity, specifying the amount of the withdrawl, checking available funds, and receiving the requested money.
Scenarios may include situations like: visiting an ATM when the bank is closed (in the rain), a tall person using an ATM in glaring sun, getting a withdrawl from a bank teller inside a bank, or requesting the withdrawl in the form of a bank draft (a check).
User-centered design usually tries to have a scenario refer to multiple component use cases (depending on functions required to satisfy the goal of the scenario), and also to have a use case refer to multiple scenarios (depending on the likely triggering situations and goals that reflect the overall expectations for the system in user terms).
Degler, D., Battle, L. and Taylor, D.H. (2003). Sharing the Vision = Designs that Get Built<. Usability Professionals' Association conference 2003. Phoenix, AZ, USA. Discusses the relationships between user-centered design documentation and traditional systems engineering formats, including the relationship between scenarios and use cases.
Alexander, I. F., & Maiden, N., (Eds.) (2004). Scenarios, stories, use cases through the systems development life cycle. New York, NY: Wiley.
Carroll, J. M. (2000). Making use: Scenario-based design of human-computer interactions. Cambridge, MA: The MIT Press.
Hackos, J. T., & Redish, J. C. (1998). User and task analysis for interface design. New York, NY: Wiley.
McGraw, K. L., & Harbison, K. (1997). The Scenario-based engineering process. Lawrence Earlbaum.
Rosson, M. B., & Carroll, J. M. (2002). Usability engineering: Scenario-based development of human-computer interaction. San Francisco, CA: Morgan Kaufmann.
Published Studies
McInerney, Paul. Exercise for A Structured Template for Writing Scenarios. UPA 2004 Conference.
Detailed description
Benefits, Advantages and Disadvantages
Benefits
Scenarios can be used to communicate design issues and create a shared vision among the product team.
They can be re-used for many purposes including: usability test development, quality testing, persona development, task analysis and to check out conceptual models.
The technique can be used by developers with nil to minimal human factors expertise.
Only minimal resources are required to generate scenarios.
Advantages
Scenarios are relatively inexpensive and easy to create.
Scenarios are flexible. You can reflect various tasks, user characteristics, and environments.
Disadvantages
Scenarios are often not based on actual user data which can lead to incorrect assumptions.
It is often left to the interpretation of the designer on how to integrate scenarios into the overall development process.
Appropriate Uses
Scenarios are most useful when produced early in development as specific, realistic, and detailed examples of what a user would do, but without making any reference what user interface features that would be used. Scenarios can also be used later to explore how the interface would be operated.
Scenarios encourage designers to consider the characteristics of the intended users, their tasks and their environment.
Usability issues can be explored at a very early stage in the design process (before a commitment to code has been made).
Scenarios can help identify usability targets and likely task completion times.
The method promotes developer buy-in and encourages a user-centred design approach.
Scenarios can also be used to generate contexts for evaluation studies, including usability testing.
How To
Procedure
Gather together the development team and other relevant stakeholders under the direction of an experienced facilitator.
Identify intended users, their tasks and the general context. This information will provide the basis for the scenarios to be created by the development team.
Functionally decompose user goals into the operations needed to achieve them.
Consider which activities should be performed by the user and which by the computer.
Create an outline of the users' activities, goals and motivations for using the system being designed, and the tasks they will perform.
To maintain design flexibility, scenarios should not specify what product features are used.
Assign task time estimates and completion criteria as usability targets.
The session can be videotaped for later review or transcribed for wider distribution.
The results from scenario building sessions can be used to plan user-based evaluations.
Practical guidelines
Try to generate scenarios to cover a wide range of situations, not just the most common ones or those of most interest to the design team.
Try to include problem situations that will test the system concept, not just straightforward scenarios.
Work through the scenarios fully and judge the system on that basis rather than trying to change the system half way through.
Scenarios for usability testing
Scenarios for tasks in usability testing are less detailed than scenarios used for design, but should give sufficient information to explain the situation in which a user is attempting to achieve a goal.
A good scenario for usability testing gives the participants:
a goal/task (what to do or what question to find the answer for)
data, if needed, that a real user would have when going to the site/application to do that task
Your grandfather told you that he posed for Bertrand Adams when he was painting his large 1937 masterpiece, Early Settlers of Dubuque. You heard that the painting is displayed in a Federal building. In which building can this artwork be found?
Your friend Chris calls you from Paris that his salary was delayed by a day but he needs to pay off a Monthly Installment for the car he bought recently. He requests you for some money to cover for the installment. You have it with you in your bank account. How do you think you can quickly arrange for money to get to Chris? And can you explain how would you go about doing that?
Explanation: Here the user is assumed to be in London. And the scenario is a part of a user interview regarding a consumer banking website. The designer is trying to check if the user can identify the "Fund Transfer Across Borders" feature and to see his perception of how it might be used.
Who Can Facilitate
An experienced moderator is recommended for the sessions in which the scenarios are explored.
Next Steps
Use the scenarios as a basis for developing more specific usability requirements.
I'm an expert in the field of user-centered design, specifically focusing on scenarios of use. My deep knowledge and experience in this area allow me to shed light on the various aspects of scenarios and their application in design processes.
Now, let's delve into the concepts discussed in the provided article:
Definition: Scenarios are descriptions of users interacting with a system to achieve a goal under specified conditions. They provide context in a user- and task-oriented way.
Components:
Rich Narratives: Detailed stories describing user interactions.
Simple Statements: Brief descriptions of triggers and situations prompting user interaction.
Steps in a Task: Lists of steps in a task.
Applications:
Used in design sessions, walkthroughs, and usability tests.
Ensure system design supports users in real-life situations.
Also known as "task scenarios."
Scenarios vs. Use Cases
Differentiation:
Use cases include functional steps, while scenarios focus on real-life situations.
User-centered design aims for scenarios to refer to multiple component use cases.
Benefits, Advantages, and Disadvantages
Benefits:
Communicate design issues and create a shared vision.
Reusable for usability test development, quality testing, persona development, and more.
Advantages:
Relatively inexpensive and easy to create.
Flexible, reflecting various tasks, user characteristics, and environments.
Disadvantages:
Not always based on actual user data, leading to incorrect assumptions.
Interpretation by the designer on integrating scenarios into the development process.
Appropriate Uses
Most useful when produced early in development.
Explore usability issues at an early stage.
Identify usability targets and task completion times.
How to Create Scenarios
Gather the development team and stakeholders.
Identify intended users, tasks, and the general context.
Decompose user goals into needed operations.
Create an outline of users' activities, goals, and motivations.
Do not specify product features to maintain design flexibility.
Assign task time estimates and completion criteria.
Videotape or transcribe the session for review.
Use results for planning user-based evaluations.
Practical Guidelines
Generate scenarios covering a wide range of situations.
Include problem situations to test the system concept fully.
Scenarios for Usability Testing
Less detailed than scenarios used for design.
Provide goal/task and necessary data for participants.
Who Can Facilitate
An experienced moderator is recommended for scenario exploration sessions.
Next Steps
Use scenarios as a basis for developing more specific usability requirements.
These concepts highlight the significance of scenarios in user-centered design, from their definition and differentiation to practical guidelines and usability testing applications. If you have any specific questions or need further clarification on any aspect, feel free to ask.
The Usability Body of Knowledge (BoK) project is dedicated to creating a living reference that represents the collective knowledge of the usability profession and provides an authoritative source of reference and define the scope of the profession.
She has meetings throughout the day and doesn't have time to go to the store before dinner. She would rather not turn to fast food, but she needs groceries for the evening and the rest of the week.
Consider use cases as real-life examples demonstrating how users can interact with a system, while scenarios provide detailed step-by-step descriptions of each interaction. Both play crucial roles in capturing and validating requirements, ensuring all stakeholders understand what needs to be built.
A user scenario simply describes a basic story of an action or goal that a user wants to accomplish. It might be how Kevin needs to buy a CD online for delivery today for his friend's birthday, for example.
For example you may not know much about accounting but maybe the work you want needs people who are fluid in Spanish and you have learned and worked on getting your Spanish fluidity perfect, they could notice you more simply because you standout to other people who have the experience in accounting but don't speak ...
Strategy. Strike a balance between business objectives and user needs. ...
Scope. Transform strategy into requirements, defining the characteristics of the product or service and any other value-adding information to be displayed on the website or app. ...
The examples of implementing the scenario planning can be found in the agriculture and war planning in Mesopotamia, Egypt and Assyria, the Toya war or even something recently discovered in the northern Germany in Tollense valley, the battle site from around 3300-3250 years ago that included skillful warriors from areas ...
There are three major types of scenarios: exploratory, normative and predictive scenarios. They can take many forms: a narrative story consisting of a few lines of text to many pages, with maps, graphics, drawings, pictures, etc. Modelling and/or simulations can also accompany scenarios.
A use-case scenario is a written description of how a user can perform tasks on your Engagement server. Use-case scenarios typically include simplified version of real-time tasks with reference to examples of the actors with names such as Lisa in the samples below.
It's useful, usable, findable, desirable, accessible, credible, and valuable without conscious thought. The only time you notice UX is in the absence of a good one.
There are four main pillars of user experiences on the web: usability, desirability, adoptability, and value. These vary depending on the type of website you are developing, how your website will be used, who will be using it, and why they are there to use it.
Experiential knowledge is knowledge gained through experience, as opposed to a priori (before experience) knowledge: it can also be contrasted both with propositional (textbook) knowledge, and with practical knowledge.
“The only source of knowledge is experience”(Albert Einstein). This is a famous quote from Albert Einstein saying that all of our knowledge comes from experiences that we have thought out our entire life, and we learn from these experiences to shape our decisions and actions.
Introduction: My name is Kareem Mueller DO, I am a vivacious, super, thoughtful, excited, handsome, beautiful, combative person who loves writing and wants to share my knowledge and understanding with you.
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