Introduction:
This Topic was presented by Mr. Innocent Kihaka and Mr. Side S. Side. Actually to my opinions I can say it was the best presentation among the best presentations which have already presented 27/04/2009 the topic was good and well understood.
Before going deeper to this topic let us have a look on some important terminologies which used in this topic which might confuse sometimes if not used well.Usability; This usability means that something can be very easy to use but not necessary to be usefully. It is normally user friendly.Usefulness; Usefulness means that something is very useful but it is very difficult to use i.e. not user friendly.
THE MEARNING OF USABILITY ENGINEERING AND HUMAN COMPUTER INTERACTION.
Usability engineering (UE):
Is the technique of developing a system which is interactive, usable or meets the needs of users.
Human computer interaction (HCI):
Is the disciplines which deal with the study of interaction between users
Why this UE and HCI?Many years ago people were struggling on how to improve the efficient of the machine. The research made at that time showed that in order the efficient of the machine the computer users were diverse and there was a need of human interactive system. Over some years the ICT has developed into discipline/field in its own right.By so doing they were intending to increase the productivity as its work force is more productive. Also decreases training and supportive costs as well as increasing the customer satisfaction and decreases technophobia. However they succeed to some extent since they reduces disastrous and fatal errors in the system which are dangerous to human life.
HOW UE AND HCI CAN BE ACHIEVED
Approaches of designing products
Product-centred design
User-centred design
PRODUCT-CENTRED DESIGN
Is the production process which does not take an account of the user’s needs.
Assumptions of the product centered design
-The result of a good design is having a product working.
-The product’s specifications are derived from the customer.
- There’s no further contact until delivery.
USER-CENTRED DESIGN
Is the design practice which is rooted in the idea that user must take center -stage in the design of any computer system.
precisely to make human being a focal point that technology should serve rather than the other way round
Assumptions of the user centered-approach:
-The result of a good design is a satisfied user.
-The process of design is a collaboration between designers and users.
-User and designer are in constant communication during the entire process
Criteria of user-centred approach
Efficiency-refers to how supportive the product is in carrying out a certain task.
Memorability - refer to how easy it is to remember how the system is used once it has been learned.
Learnability-refer to how easy it is to learn to use the product.
Safety-Protecting the user from dangerous and undesirable situations.
Entertaining-if a product was for entertainments then it has to reach that goal.
Motivating- the product made should encourage the user to continue working with it
Visibility-links in the interface has to be clearly visible.
Affordance- the price of the product should relate to the income of the society.
Feedback- the interface has to respond on whatever is done and give right suggestions.
Colour- Product should take an account of colour psychology.
CHALLENGES: Hard to get requirements from users who have no technique expertise.
Due to technological advancements, the societies’ needs varies with time.
Large amount of fund is need in the development of new product.
Difficult to build a system which can suit all types of users and their needs.
FUTURE :
Computes are too cumbersome and unwieldy tools. We need a small and specific appliances for specific jobs.
Decreasing costs but increaced efficiency of products.
Increasing innovation in input techniques (i.e., voice, gesture, pen).
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