Defined outcomes, common goals and correct skills are keys to success.
You might want to create a team if you can't execute a task individually or if the task requires working interdependently. Here’s how:

Create a common, shared goal and a strong task orientation that translates into each person knowing how to move towards that goal.
Promote interdependency. Each person needs to know what they're going to contribute.

Have measurable outcomes. Team execution is usually more effective if you can measure what the team produces. Talk about cultural differences and allow people to have some fun with them. For example, in intercultural sessions, you might take accepted cultural dimensions and have people predict how their nationality might behave in certain situations.

Build a unified team

Realize that people need to understand differences before coming together effectively and building a unified team. You should also continually stress the team's purpose and its measurable outcomes and make sure team members have the right skills and technical competence, interpersonal skills (cross-cultural sensitivity) and good problem-solving skills.

Use training to help team members develop interpersonal, intercultural skills and provide detailed agendas for meetings.
Spell out lines of communication to find out how people will communicate with one another?