What is the optimal team size, in your opinion?

The optimal team size depends on the task and context, but it is generally considered that an effective team consists of 5–9 people.

Fewer than 5 people may lack diversity of skills and resources. More than 9 people make communication more difficult, increase the risk of misunderstandings, and reduce productivity.

It is also important to consider:

• Clear role distribution.
• Good communication.
• Ability to make quick decisions.

For example, in Agile practices, teams of about 7±2 people are recommended for optimal interaction.