Errors and social level: the errors
	Slip	Lapse	Rule-based	Knowledge-based
Individual	slip	lapse	rule-based mistake	knowledge-based mistake
Group
	Abermule rly crash
	.
	.
	Group-think errors in the military
Organisation
	Team error
	Goals for which there is no dept.
	Management error: wrong bureaucratic rule gets control
	Policy error: bad plans
Society
	One organisation fails to perform
	Forgotten problems (caught by charity?)
	Social work teams e.g.police, GP, social worker
	Policy errors