Definition & Meaning of "fools and bairns should never see (a) half done work"in English

What is the origin of the proverb "fools and bairns should never see half done work" and when to use it?

The origin of the proverb "fools and bairns should never see half done work" is believed to date back to Scotland, where it appeared in various forms in older works. The phrase suggests that incomplete or unfinished work can often be misunderstood or criticized by those who do not fully understand it, particularly by those who are inexperienced or naive. It emphasizes that only those who are knowledgeable or capable should be involved in judging work that is still in progress. The proverb is commonly used to remind people not to rush to judgment, as incomplete efforts may be misinterpreted by those who lack the insight or understanding.