[Sigia-l] Error Prevantion Heuristic (slightly OT)

[Marion Summerville]

How about providing the info up front (immediately in context; right at the point of data entry) that the acceptable values are 10-500?
 
If "prevent" means "pop up an alert when the user changes focus from the field" rather than "accept the submission and return an error message" then prevent is better (imo; based on no data but watching my mother curse at the screen of her iMac).
 
Marion

	-----Original Message----- 
	From: Richard_Dalton at vanguard.com [mailto:Richard_Dalton at vanguard.com] 
	Sent: Tue 6/17/2003 3:08 PM 
	To: sigia-l at asis.org 
	Cc: 
	Subject: [Sigia-l] Error Prevantion Heuristic (slightly OT)
	
	

	One of Jacob's much touted "10 Heuristics" is: "Even better than good error messages is a careful design which prevents a
	problem from occurring in the first place". Sometimes though I think this
	can be taken too far ... for example, if a system's acceptable inputs are
	within the range 10-500, should the system prevent a user from entering
	600, or should the system accept it and give feedback to the user saying
	that the acceptable inputs are 10-500?
	
	 - Richard Dalton
	
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