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|The New Zealand experience has shown that the trend in technologi- cal change in gold extraction can be characterised by a systems approach which grows progressively broader with advances in understanding and allowing for an increasing number of factors. The Australian experience has demonstrated that the elements of developing an exportable process include allowing projects to prolifer- ate where substantial entrepreneural involvement is likely to occur. In both countries useful technological breakthroughs were invariably discarded when first tried at operations not well established and under great pressure of achieving and maintaining production. It required the efforts of persistent individuals at operations which had become bedded in and profitable, to follow the initial work up and commercialise it.|