The queue belongs to the machines. Which press, which finishing and which of them is already committed determines what can genuinely be promised, and a list of jobs sorted by date says nothing about capacity.
The proof is the bottleneck. A customer who has not approved by four o'clock has moved their own deadline, and recording when a proof was sent and when it was approved is what makes that conversation factual rather than an argument.
Reorders should take two minutes. Artwork stored against the customer, with the previous specification and price, is what turns a repeat order into a transaction instead of a project.
Short runs are profitable or not depending on setup. Make-ready time and waste sheets are a fixed cost regardless of quantity, and a shop that does not measure them quietly loses money on every small job it takes.