User login


A number of key features are only available to registered users. They include: Access to the full content of top-rated material (only teasers are available to anonymous users after the material has been posted for 45 days) The ability to search site content The ability to access reviews of books relevant to site material The ability to access key quotes relevant to site material The ability to access content from partner sites The ability to rate material The ability to post comments The ability to post new information and propose it for publication The ability to request email notification when selected content is added or updated

A number of key features are only available to registered users. They include:

Access to the full content of top-rated material (only teasers are available to anonymous users after the material has been posted for 45 days)
The ability to search site content
The ability to access reviews of books relevant to site material
The ability to access key quotes relevant to site material
The ability to access content from partner sites
The ability to rate material
The ability to post comments
The ability to post new information and propose it for publication
The ability to request email notification when selected content is added or updated

Unknown unknowns

View
links

Submitted by Bryan Pflug on Fri, 01/26/2007 - 19:49

People can do remarkably well in controlling complex machines whose workings are fully understood and open to view. One example is how crews manage to land airplanes on the decks of aircraft carriers at one-minute intervals or less with very few accidents, especially considering the hazards. When meeting a new system, people need time to know its workings under good conditions and bad. The most dangerous time is when the operators don't know what they don't know.

— Jame R. Chiles

Inviting Disaster

Login or register to post comments
Bryan Pflug's Quotes

Pflogging

User login

Unknown unknowns