My scenario is for when the development team has done some work on a card, but then is waiting on something from an external resource before the work for the card can be completed. Typically, this happens when a client still hasn't delivered audio or graphical assets which are needed to complete the card. We could just put a block on the card, but then that would limit the WIP for that lane and for the resource working on it, but we sometimes can't predict when our client will deliver, so we can't tie up that resource or the in progress queue.

As you suggest, we can probably just use the Ready lane type, that will probably work, thanks!