Large events such as conferences take extreme coordination and preparation to be successful. This can increase dramatically when conference interpreting services are needed to serve a multilingual audience.
To ensure a smooth and successful event, preparation for interpreter services should begin with ample time until the event otherwise you risk all your hard work and preparation not being accurately conveyed in multiple languages which can reflect poorly on your organizations ability to organize and run an event to non-English speakers.
More information: http://blog.ititranslates.com/10-tips-preparing-for-conference-interpreting-services