This pattern is unrestricted; it is used within any architectural layer.
What does a professional developer do when a pattern has not yet emerged for a class? Take a guess? Imagine the final outcome? Avoid communicating this interim status to colleagues?
A PED To Be Determined (TBD) class recognizes that the first opportunity to engage in Pattern First Thinking may not be “the last responsible moment” for clarifying to colleagues a pattern choice. Said more simply, a “TBD” suffix indicates to fellow team members that an effective pattern description has not yet emerged.