Methods of collecting, classifying and interpreting data on human performance lie at the very root of ergonomics, and these methods are collectively know as qtask analysisq. They mirror both our current understanding of human performance and the design of systems which best serve the needs of their users. The concepts and techniques of task analysis have changed dramatically in recent years, and this collection serves to provide a summary of current research and advanced practice. It consists of eleven chapters written by distinguished practitioners in the field, ranging in scope from classical ergonomics to cognitive psychology, software engineering and systems design. This book is a production of a 1998 special issue of the journal Ergonomics , with a new introduction from the editors.Analysing or designing a system using DFDs generally starts with a a#39;context diagrama#39;, often called a a#39;Level 0 DFDa#39;, that shows the ... the single context diagram process into a a#39;Level 1 DFDa#39; (DFD 1) that consists of two or more processes and, optionally, data stores. ... For example, figure 2 shows the level 1 DFD for figure 1.
|Author||:||John Annett, Neville Anthony Stanton|
|Publisher||:||CRC Press - 2000-03-01|