Event capacity gap estimator
The plan looks full, the team looks busy, and nobody has put the hours against the weeks.
…
The short answer
The estimator sets the hours each period needs against the hours your team can realistically give in that period. The gap is required minus available, shown separately for general and specialist work.
Hours are not people. Overlapping in-person tasks are counted by people, and nobody is assumed to cover several full-time projects.
What to enter
- Periods: your own names, such as Week 1 or Event week.
- Internal hours realistically available in each period, after other projects and normal work. If unknown, leave blank.
- Specialist hours available, and the number of people available for in-person tasks. Leave blank if unknown.
- Tasks: the hours each needs, the period it falls in, and whether it needs a specialist skill.
- Tick in person for a task that must happen at a set time and overlaps other in-person tasks in the same period.
How the gap is worked out
For each period, general gap is general hours needed minus internal hours available. Specialist gap is specialist hours needed minus specialist hours available. A positive gap is a shortfall and a negative one is spare time.
A surplus in one period never covers a shortfall in another. The total shortfall adds up only the periods that are short.
People, not just hours
Three registration, stage and room tasks that run at the same time need three people, even if the total is only a few hours. If fewer people are available, the result shows a people gap whatever the hours say.
Blank availability is unknown, not zero and not enough. The result flags it so that someone supplies the number.
Limits
The figures are only as good as the availability you enter. Ask each person what they can realistically give, not what they could give if nothing else happened.
Use the gap to decide whether to re-plan, borrow capacity or bring in help, and compare the options with the engagement selector. The committee workload planner shows who is carrying what.
Worked example · Fictional example
A fictional industry forum
Fictional organisation and figures, to show the gaps.
In Week 1, a fictional forum has 38 hours of general tasks against 30 internal hours, a general gap of 8 hours. In the event week it needs 36 general hours against 40 available, so 4 hours are spare, which do not offset Week 1.
Three in-person tasks overlap in the event week but only two people are available, so there is a people gap of 1. Live translation coordination needs 10 specialist hours against 8 available, a specialist gap of 2 hours.
Use this yourself
Capacity worksheet
Fill one row per period. Work the gaps as needed minus available, and keep specialist and in-person people separate.
| Period | General hours needed | Internal hours available | General gap | Specialist hours needed | Specialist hours available | Specialist gap | Overlapping in-person tasks | People available |
|---|---|---|---|---|---|---|---|---|
Handle it in-house, or bring in help?
Your team can usually handle this when
- The gaps are small and can be closed by moving tasks to a quieter week.
- Volunteers or colleagues have confirmed the hours they can give.
Outside planning help earns its fee when
- Shortfalls sit in the weeks closest to the event and cannot move.
- People gaps appear for overlapping in-person tasks on the event days.
- Specialist hours are missing and nobody has been asked to cover them.
Need temporary dedicated capacity?
An embedded event project manager adds dedicated hours for a defined period, working inside your team on the workstreams you agree. If a full embedded role is more than the gap needs, an outsourced conference project lead can coordinate within a smaller agreed scope. Specialist production work remains a separate referral.
Questions organisers ask
Why is a surplus in one period not netted against a shortfall in another?
Hours cannot be moved between weeks that easily, and a deadline in one week cannot use spare time from another.
Why does the tool count people as well as hours?
One person cannot be in two places at a set time, so overlapping in-person tasks each need their own person.
What if I do not know the available hours?
Leave them blank. The gap is shown as unknown, not zero.
Related resources
Content record: Draft. Written from the cited sources and checked by automated rules; not yet independently reviewed.