From Longman Dictionary of Contemporary Englishfine-tuneˌfine-ˈtune verb [transitive] IMPROVEto make very small changes to something such as a machine, system, or plan, so that it works as well as possible Over the next few days, we fine-tuned the scheme and made some useful improvements. —fine tuning noun [uncountable]→ See Verb table
Examples from the Corpus
fine-tune• The natural gas industry continues to fine-tune its structure and business strategies.• The election campaign had to be constantly fine-tuned so that the right message got across.• You've established the general direction you want to go in, now you need to fine-tune your plans. 