Be clear and concise in your delegation.
Something you will learn from outsourcing your test projects is how to delegate effectively. If you don’t ask for exactly what you want, chances are you won’t get it.
Good outsourcing companies will have a format for gathering this information, or will ask very specific questions in order to get all the detail they need. However, in the first instance be clear about the result you want to achieve giving as much detail as possible, any direction about how you want that to be achieved and give your project budget or time allowed, and your deadline.