There is strength in numbers, and you’ll find this phrase often repeated simply because it’s true. However, numbers become less efficient if there is no organization involved. Each member of a group must have synergy with other members, so they make the most use of their capabilities instead of just standing there or even hindering each other.
The most important thing in any group of multiple individuals is that they all follow a similar mindset and goal. They must back each other up. This is where teamwork comes into play, and you’ll often see work places stress the importance of teamwork. Teamwork is what makes things efficient.