Heuristics Rule Number 9 - Drive

Heuristics Rule Number 9
“Help users recognize, diagnose, and recover from errors”
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Error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively suggest a solution.

In other words the interface design should help the users to identify what is the exact error and suggest a way to get rid of that. If the user is not getting a helping hand on an error, they will definitely move away from the product.

When conducting a Heuristic Evaluation on interface design that is intended to find usability problems at heuristic point number 9, Help users recognize, diagnose, and recover from errors I usually make a question like the following:

1.Is the user being presented with an error message (no message) compilation adding wrong information in the form or in the dialogue?

2.Are users given human-readable error messages that offer useful information about how to correct problems?

3.Are users given an error message that doesn't blame the user for the error?

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