Week 6: Who gets to be urgent?

The Office introduces a Priority Lane, and this lecture asks who declares urgency, who checks the declaration, and who pays for it.

29 March 2027

FCFS orders by arrival time; SJF orders eligible requests by service duration. This lecture introduces a third kind of rule: order by declared urgency. The Office of Everything calls its version the Priority Lane, and this lecture is about the question a priority rule always raises before its mechanics do — who gets to decide something is urgent?

Outline#

• priority ordering as a third axis, orthogonal to both arrival time and service time: it asks a queue to trust a claim rather than measure a fact
• who declares priority in the Office’s design, who verifies the declaration, and what happens if nobody checks it
• the incentive problem: if declaring urgency is free and unverified, people seeking earlier service have a reason to claim it. Whether they do depends on their preferences, norms and expectations; the notice alone does not establish that everyone will claim urgency or that the lane has failed
• priority versus SJF’s starvation: a priority rule can starve the same way SJF does, but for a different reason — not “always shorter,” but “always outranked”
• introducing the Office’s Priority Lane as it is actually specified this week, so that later in the course you can audit it against how it is actually used

Office of Everything file — synthetic case material. New counter notice: “A Priority Lane is now open for urgent matters. Urgency is self-declared at the ticket dispenser. Please do not declare urgency unless your matter is genuinely urgent.”

This week’s Queue Lab compares FCFS, the Quick Enquiries draft, and the Priority Lane against the same case, then asks you to choose and defend one for the Office of Everything — the direct rehearsal for the Policy Trial, due at the end of week 7.

Use Normal Day in the Queue Policy Lab to inspect the same tickets under all three rules. An unchanged mean can still hide a redistribution of waiting time between people.