Definition

The cap (capacity) is the maximum number of attendees admissible to an event or single session. It is constrained by both physical space dimensions and safety regulations (e.g., fire marshal, occupancy permits). It determines the registration, overbooking and waiting list strategy.

Details and formula

Typical strategy:

  • Physical cap: defined by the venue's occupancy office (e.g., 300 people)
  • Effective registration cap: physical cap × (1 + expected no-show). E.g., cap 300 + no-show 15% → admit 345 registrations
  • Waiting list: beyond effective cap, registrations go on waitlist, auto-promoted on cancellation
  • Hard stop: at event start, an unbreakable safety block

Context and typical ranges

Cap management is particularly critical for:

  • Medical conferences where specific rooms have strict caps imposed by occupancy permits
  • Multi-track events where each session has its own cap
  • Free events with high no-show where under-booking means wasted capacity
  • Sponsored events where attendee count is a contractual KPI to the sponsor

How it applies in OAK EVENTS

OAK EVENTS supports multi-level caps (global event, per session, per zone), automatic waiting list management with promotion on cancellation, soft (warning) and hard (block) thresholds, and live in-room occupancy dashboard in real time.

Want to see event capacity (cap) in action?

With OAK EVENTS it's a native platform feature: book a demo and we'll show it to you on a real event.

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