Yes, even companies should have their own "black book" when it comes to picking and choosing their outsourcing providers.

Personally, a directory is an organized way of collecting and retrieving information. In this way, you would be able to look back at the different outsourcing companies including important details such as contact number and person. Aside from contact numbers, other important information as well as cost and destination could be included in your own personal outsourcing directory.

In this way, you would be able to save time particularly in gathering the information that you need from companies. The only thing that you have to do is to update it from time to time. This is to ensure that all the information in there are true.