A Chain Is Only As Strong As Its Weakest Link
Meaning
This means that usually a team fails because of the weakest performer of that team. This proverb is more used because of its literal meaning and does not actually relates to the chain links. It usually applies to technical features or an individual to lay stress on what could be a possible cause of failure.
Origin
It is believed to be originated by Anne Robinson in UK’s popular TV show. This phrase was then used all over the world to convey the message that failure is because of your weakest point. it gained more momentum when in 1812 William Windham used this phrase in one of his Parliament’s speech.
“The strength of a chain, according to an old observation, was the strength of the weakest link.”