Table 2 Factors influencing effectiveness in Australia and New Zealand
HIA Process | Context | |
 Necessary | Contingent | |
  Purposeful and structured stepwise process | Capacity and experience (right person and right level) | Fit with planning and decision making context |
  Flexibility | Involvement of decision-makers | Broader global context |
  Use of evidence | Involvement of communities | Unanticipated events and activities that may influence a HIA |
| Â | Relationships/Partnerships (organisational and individual level) | Shared values and goals |
Cross cutting | ||
 Time and timeliness | ||
 Proactive positioning | ||