efficient instrument efficient integration efficient internal efficient international efficient investment efficient irrigation efficient it efficient learning efficient legal efficient light efficient lighting efficient logistics efficient machine efficient machines efficient maintenance efficient management efficient manner efficient manufacturing efficient market efficient marketing efficient markets efficient material efficient materials efficient means efficient measures efficient mechanism efficient mechanisms efficient meetings efficient method efficient methods efficient mixing efficient mobility efficient model efficient models efficient motor efficient movement efficient navigation efficient network efficient new efficient office efficient one efficient online efficient operating efficient operation efficient operations efficient option efficient order efficient organisation efficient organization efficient packaging efficient partner efficient partnership efficient payment efficient performance efficient planning efficient plant efficient portfolio efficient power efficient pricing efficient procedure efficient procedures efficient process efficient processes efficient processing efficient procurement efficient product efficient production efficient production processes efficient products efficient project efficient project management efficient protection efficient provision efficient public efficient public administration efficient public transport efficient quality efficient recovery efficient recycling efficient regulatory efficient removal efficient resource efficient response efficient results efficient road efficient route efficient running efficient sales efficient search efficient security efficient separation efficient service efficient services efficient social efficient software efficient solar efficient solar panels efficient solution efficient solutions