Validation
Validating input to prevent mistakes. For example, preventing stock orders with a price that is too far from the market price such as a bid of $15 for a stock trading at $5.Input Correction
Automatically suggesting a correction to input. For example, a search that makes a correction based on edit distance. The user is typically given a chance to override the suggestion to allow for unique input.Input Flexibility
Systems that allow for a wide range of inputs to be understood. For example, a button with a generous touch target so that you don't have to touch it with precision to work. Voice commands may accept hundreds of variations of a single command.Pokayoke
Constraints that prevent mistakes. For example, a battery unit that can not be installed incorrectly due to its shape.Undo
The ability to undo actions or series of actions.Shutdown
A machine that turns off if the user does something dangerous. For example, a camping heater that turns off if it is knocked over.Friendly Errors
Telling the end user exactly what's wrong as opposed to a cryptic message or beep.Clear Warnings
Warnings that are clear and direct. For example, an altitude warning in an aircraft that says "go up, go up, go up."Authentication & Authorization
Systems of authentication and authorization such that people can't do things without a specifically granted permission. For example, a new employee who doesn't have system authority to accidentally delete your customer database.Limits
Systems that enforce operational limits. For example, flight envelope protection that prevents a pilot from pushing an aircraft beyond its structural and aerodynamic limits.| Overview: Error Tolerance | ||
Type | ||
Definition | The design of things to be resilient to human error. | |
Related Concepts | ||
