Task-centred design

ABSTRACT

A task-centred approach to systems design and evaluation is presented. In particular, task analysis and task modelling are described as major human factors tools for a structured user-centred and task-centred design methodology. It will be shown how these techniques can be exploited throughout the development process, and their beneficial effects in terms of software usability.The method is presented discussing the experience of the Esprit Project CHARADE, an integrated system for handling environmental emergencies. Starting from the notion that usability means "usable to perform some tasks", the role of task analysis and task scenario and their contribution to system design and evaluation are discussed.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.1 MODELS AND PRINCIPLES
      H.1.2 User/Machine Systems
          Subjects: Human factors

Additional Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)

  I. Computing Methodologies
  I.5 PATTERN RECOGNITION
      I.5.5 Implementation
          Subjects: Interactive systems

  K. Computing Milieux
  K.6 MANAGEMENT OF COMPUTING AND INFORMATION SYSTEMS
      K.6.1 Project and People Management
          Subjects: Life cycle

General Terms:
Design, Human Factors, Theory