For example, if, during your investigation, you've identified through the return to production orders....
An investigation is not necessarily linear. Depending on whatever has happened, it's possible that in your attempt to identify the possible sources of information, you've sent out multiple production orders to try to glean some initial information about what actually happened, and in the process of sending out those orders, you might receive an order back from another company. In there, there might be some information that may hint at, allege...or point you in another direction to another company that might possess the same information or similar information to what you were requesting from the first company.
This can happen, because investigations are dynamic and all types of information are received, and then there has to be an analysis of the information. There are stages. It's not something that can be done very quickly.