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design notes lecture 1, Thesis of Design Patterns

IIT Delhi is a renowned institution of higher education in India, known for its excellence in engineering education. The notes produced by the professors at IIT Delhi are highly sought after by engineering students and professionals alike, as they are considered to be of the highest quality and provide comprehensive coverage of the subject matter. These notes cover a wide range of engineering topics, from the fundamentals of mathematics and physics to advanced concepts in mechanical, electrical

Typology: Thesis

2022/2023

Available from 03/08/2023

danish-abdullah
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Design of interaction system 1
Design of interaction system
Created
Tags notes
lecture
Computer Science notes
This minisite contains notes taken by Chris Northwood whilst studying Computer
Science at the University of York between 2005-09 and the University of Sheffield 2009-
10.
They are published here in case others find them useful, but I provide no warranty for
their accuracy, completeness or whether or not they are up-to-date.
The contents of this page have dubious copyright status, as great portions of some of
my revision notes are verbatim from the lecture slides, what the lecturer wrote on the
board, or what they said. Additionally, lots of the images have been captured from the
lecture slides.
Interactive Systems
At its broadest, an interactive system can be any technology intended to help people
complete a teask and acheive their goals, however this could include things like pens,
which could help acheive the goal of leaving a message for a friend, so we tighten this
definition to be any technology incorporating some form of electronic logic designed to
help people complete tasks/acheive goals.
Alternatively, we could define this as any complex system with a UI. That is, something
we need to give instructions to and know the status of in carrying out those instructions.
These things are called systems (or artefacts), which we have dialogues with. Having
dialogues with non-humans (and other animals) is a relatively new concept over the
past 50 years.
Usability
@March 7, 2023 11:58 PM
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Design of interaction system 1

Design of interaction system

Created

Tags notes

lecture

Computer Science notes

This minisite contains notes taken by Chris Northwood whilst studying Computer Science at the University of York between 2005-09 and the University of Sheffield 2009-

They are published here in case others find them useful, but I provide no warranty for their accuracy, completeness or whether or not they are up-to-date. The contents of this page have dubious copyright status, as great portions of some of my revision notes are verbatim from the lecture slides, what the lecturer wrote on the board, or what they said. Additionally, lots of the images have been captured from the lecture slides.

Interactive Systems

At its broadest, an interactive system can be any technology intended to help people complete a teask and acheive their goals, however this could include things like pens, which could help acheive the goal of leaving a message for a friend, so we tighten this definition to be any technology incorporating some form of electronic logic designed to help people complete tasks/acheive goals. Alternatively, we could define this as any complex system with a UI. That is, something we need to give instructions to and know the status of in carrying out those instructions. These things are called systems (or artefacts), which we have dialogues with. Having dialogues with non-humans (and other animals) is a relatively new concept over the past 50 years.

Usability

@March 7, 2023 11:58 PM

Design of interaction system 2

For many years, the key has been thought to be making interactive systems usable, i.e., giving them usability. To be usable a system needs to be effective. The system supports the tasks the user wants to do (and the subcomponents of such tasks). We could also consider other components to make things usable. Efficiency - the system allows users to do tasks very quickly without making (many) errors; Learnable - the system is easy enough to learn to use (commensurate with the complexity of the tasks the users want to undertake); Memorable - the system is easy enough to remember how to use (once, learnt) when users return to asks after periods of non-use. We are now moving beyond that to consider satisfaction - the system should make users feel satisfied with their experience of using it. Positive user experience, rather than usability has now become the focus of the design of interactive systems, particularly as we have so many systems that are for leisure, rather than for work. This expands usability to cover issues such as: Enjoyable Fun Entertaining Aesthetically pleasing Supportive of creativity Another way to think about usability is for the user interface to be transparent/translucent to the user - the user should be concentrating on their task, and not on how to get the system to do the task. This might not be the case originally however, though. For example, with the pen, you had to think about it when younger and how to use it, and now you don't.

Difficulty in Designing Interactive Systems

Designing interactive systems on computer systems for non-experts has only been developed for 25 years, whereas something like teapots has had 4000 years to be perfected (and still has dripping spouts!). Books have had 500 years to develop systems containing the best design features (page numbers, table of contents, index, chapter numbers, headings, etc) and books can be used as interactive systems.