UNI EN 894-1 : 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Design principles for operator-task relationships
  4.1 Suitability for the task
      4.1.1 Principle of function allocation
      4.1.2 Principle of complexity
      4.1.3 Principle of grouping
      4.1.4 Principle of identification
      4.1.5 Principle of operational relationship
  4.2 Self-descriptiveness
      4.2.1 Principle of information availability
  4.3 Controllability
      4.3.1 Principle of redundancy
      4.3.2 Principle of accessibility
      4.3.3 Principle of movement space
  4.4 Conformity with user expectations
      4.4.1 Principle of compatibility with learning
      4.4.2 Principle of compatibility with practice
      4.4.3 Principle of consistency
  4.5 Error tolerance
      4.5.1 Principle of error correction
      4.5.2 Principle of error handling time
  4.6 Suitability for individualisation and learning
      4.6.1 Principle of flexibility
Annex A (informative) - Human information processing
Annex ZA (informative) - Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 98/37/EC, amended by 98/79/EC
Annex ZB (informative) - Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 2006/42/EC