The DTODeliverablesQueue handles deliverables requests, that is, a user requests generation of the deliverables from a configurable (formerly generic) part. Requests are put into the queue, processed, and results are sent back to the user when complete. The only out-of-the-box supported deliverables maker is the BOMMaker, which generates variant part structures. This generally runs quickly. There are other deliverables makers and it is possible for customers to write their own deliverables makers, which may take a long time (minutes or hours). The DTODeliverablesQueue is most useful in these cases.