From the odd snippets of information around, I've compiled this incomplete list of rumour and speculation.
The Sony factory in Wales assembles the Pi's for both RS and Farnell
The Rasberry Pi Foundation have an agreement with RS and Farnell regarding production and sale of the Pi. That being confidential, we don't know if Sony are a party to that or if they have a separate agreement with the Foundation or with RS or Farnell, or any mix of the three.
We also don't know if their representatives ever arrive at the factory together, and if so, and have lunch, what's on the menu.
Sony maintains two separate stores (cardboard boxes? shelves? storerooms? warehouses?) of components and builds for RS and Farnell on alternate days. Whether Monday is always RS and Sunday is an off-day, or Farnell gets an extra day in leap-years, is unknown.
We also don't know when or how the change-over happens. Does a siren sound at midnight, all the machines halt, and all the staff go to the canteen for a coffee while the security squad check to make sure no RS components are left lying around before the Farnell stuff is allowed in?
We haven't been told whether an RS truck arrives to restock their cardboard box, with a separate Farnell truck for theirs, or they have an arrangement with Eddie Stobart to deliver both. Nor have we been told the name of the engine-driver's daughter.
We also don't know if those components include the bare PCBs, or that is handled separately.