Rpd2010 usabillitystudyinthedevelopmentofhumanmachineinterfacesimprovementofproducts.ppt

USABILLITY STUDY IN THE DEVELOPMENT OF HUMAN-

MACHINE INTERFACES: IMPROVEMENT OF PRODUCTS

IDENTIFICATION AND ACCESSIBILITIES

Tomé Canas, Brisa Inovação e Tecnologia SA, [email protected];

Tiago Girão, TGDesign Lda, [email protected]

Jorge Sales Gomes, Brisa Inovação e Tecnologia SA, [email protected]

USABILLITY STUDY IN THE DEVELOPMENT OF HUMAN-MACHINE INTERFACES: IMPROVEMENT OF PRODUCTS IDENTIFICATIONS AND ACCESSIBILITIES

Introduction

Interface Design

Case Study

Brisa and BIT

Contents

Brisa and BIT

ETOLL Project

Interface First Version

Pitfalls and Analisys

Redesign

Actual Version

Conclusions

Improved efficacy: fit for purpose

Increase efficiency: reduce time required to complete

operation

Direct impact/contribution on the quality of the service

Critical for overall systems operability

Interface Design


Direct impact/contribution on the quality of the service

provided

A good interface should have:

Have a intuitive manipulation

Information structure: simple, quick and universal

User-friendly

Interface Design

Combined technical skills of different areas:

electronics, mechanics, software and industrial design

Interface evaluation and redesign through several

stages of evolution: design improvement

Development Process:


stages of evolution: design improvement

User involvement during all development phases

Interface Design

• Testing on physical prototypes

• Gather data to optimize the design

• Determine data under real environment of operation

Experimentation - Prototypes


• Determine data under real environment of operation

• Emphasis on the "look and feel"

Case Study – Brisa and BIT

• 6 concessions in Portugal: 1 674 Km and 24 highways

• 2 international assets: NWP, the United States and

Movenience, Holland

• Innovation and partnerships are strategic axles

One of the principal European highway operators


• Innovation and partnerships are strategic axles

• Brisa Inovation and Technology (BIT):

• Created in 2009 but with predecessor direction since

2003

• Around 80 workers

• Innovation Network: catalyzing innovation with its

partners

• Innovation is strongly associated with value creation:

"value creation in a changing context”

Case Study – ETOLL Project

To install on the manual lanes of the toll plazas

Operate in periods of lower traffic and increase the

number available lanes

With two levels: cars and trucks

Develop an automatic payment machine :


With two levels: cars and trucks

Innovative aspect: assistance made by human

remote operators, observing and follow all the

operation

The design process involved several areas:

electronics, mechanics, software, industrial design,

materials, ergonomics and metalworking

Operation procedure:

Case Study – First Version

Development process was based on an inside-to-

outside methodology:

The modules were arranged internally

according to engineering requisites and

User interface:


according to engineering requisites and

internal module functionalities

Only in a late development stage the concern

with the user interface come out

Little freedom to develop the user interface

Case Study – First Version Pitfalls

Identified a number of difficulties that users had:

Difficulty in understanding the start operation:

leading users to insert the title in the bank card

readers

Difficulty in following the operations sequence:


Difficulty in following the operations sequence:

non-linear path between operation areas and the

large distance between the diverse modules

Large interface area: trouble to access to the

lowest area “Collect Change”

Case Study – Analyze

Interface prototype testing:

Paper prototyping – testing the interaction

process and the position of the different modules

Empirical study using various users – different

anthropometric dimensions


anthropometric dimensions

Different classes of vehicles, cars and vans

Optimal area of interface determination

Using the test data to make an anthropometric

interactive table

Case Study – Redesign

Reduction on interface area:

Optimizing internal space

But due to limitations in internal storage

modules, this required ingenious solutions

New interface shows several improvements:


modules, this required ingenious solutions

New information structure:

Maximum of three major operations: 1-title

insertion; 2-payment; 3-collect both change

and bill

Major areas identified, giving information

about the complete sequence and where to

start (trigger operation)

Case Study – Redesign

Sequential structure to follow the easiest path of the

extent user’s left arm;

Blinking led bars helpers - placed to give immediate

feedback and to guide through the next operation

Results – New machine and interface:


feedback and to guide through the next operation

Pre-recorded voice helper

Human-remote assistance integrated with video-

surveillance

Case Study – Actual Design

User improvement for a wide range of heterogenic

users

Reduced operation time

Less intervention of remote operators helping new

Several improvements were identified:


Less intervention of remote operators helping new

users

Fewer printed instructions needed in the layout

surface

The new aesthetic appellative user interface

help enhance the positive attitudes towards the

machine by the users

The project is now on the production/installation

phase: over 200 machines in the Brisa’s network in

2010

Conclusions

Concerned with the user interface from the project

beginning

Constructive use of different prototyping techniques,

many of low cost, in selecting the most appropriate user

layout


Monitoring the use of new equipment by the user,

identifying difficulties that occur during the operation

Through a process of experimentation and learning,

improve the functional and aesthetic machine interface

Thank you for your attention

End

USABILLITY STUDY IN THE DEVELOPMENT OF HUMAN-MACHINE INTERFACES IMPROVEMENT OF PRODUCTS

Tomé Canas Tiago Girão Jorge Sales Gomes