Human factors; occupational safety : a report to the Labour Safety Council of Ontario.

The organized safety movement and some assumptions on which it is based are examined. Criteria for measurement of success or failure are reviewed and an attempt is made to show how these criteria must be considered to be dependent upon one another rather than as separate entities. The prevention or avoidance of accidents is shown as a complex interaction of forces rather than the simple elimination of 'unsafe acts' and 'unsafe conditions'.