How many permits were open at once? The concurrency page

The Concurrently open permits page shows how much work ran in parallel: how many permits were open on average and at peak during the period, by plant and by hour of day. It is a numbers-based picture of the load of parallel work — for example which hour of the day has the most permits open. (It does not check for conflicts: it shows how many permits run together, not whether they contradict each other.)

Before you start

• Permission: the same as for the permit report — the right to view Analytics analytics:view and to view permits ptw:view, with both modules switched on.
• How to get here: the page opens from the permit report, through the link on the “Report layout” card: “Concurrently open permits — average, peak, time of day →”. The link carries the report’s applied filter.

Steps

The overview, the plant breakdown and the hour-of-day table (daytime hours shown). The average adds up across plants; the peak does not.

1. Set the filter in the permit report and update the report: the period (“From (site day)” and “To (site day)”), the site, plant, type and the other filters apply here too.
2. Click “Concurrently open permits — average, peak, time of day →” on the “Report layout” card.
3. Check the window. The page header states: “Window: … – … (time zone)”. If the filter has no “from” date, the window starts with the first open period, and the page says so.
4. Read the overview: “Average open at once”, “Peak” (and “Peak first reached: …”, when), and how many permits were open during the window.
5. Look at the two breakdowns: “By plant” (open in window · average · peak · when the peak was first reached) and “By time of day (local hour)” (per hour, the average and the peak, across all days in the period).
6. Use “Back to the breakdown” to return to your filter.

If it worked

The Total row, the plant rows and the time-of-day table are all filled in. If no permit was open in the window the page says so: “No permit was open during the window.”

What “open” means, and what adds up

• Open = from the first issue until closing, cancellation or expiry; an extension after expiry reopens it. The page computes from the signature chain, i.e. from what the permit’s life actually recorded.
• The date sets the window here. Every permit that was open during the window counts, whatever day it was issued — the date-axis setting has no effect on this page. The other filters narrow the selection as in the report.
• The average is time-weighted: total open time divided by the window length. It adds up across plants, the peak does not — the Total peak is computed from the whole set, not as the maximum of the plant peaks.
• A running permit gives a lower bound. While some permits are still open, the figures run up to now, and the page says so: “Some permits are still open: the figures run up to now (a lower bound).”
• Several time zones: if the selected sites are in different time zones, the window and the hours are in one stated zone.
• The numbers do not open a list. “Open overlap is not a filter axis, so these figures do not open a permit list.” Reach the permits in the report or the export.

Not the same as the dashboard metric

The dashboard metric “Peak of concurrently open permits”, when several plants are combined, is the maximum of the per-plant peaks — the peak of the whole site is at least that, but may be higher. Come to this page when you need the true combined peak. The metric is explained in the article on permit metrics.

Common problems

What you see	Why	What to do
There is no link on the “Report layout” card	The page is only offered for a working report (both modules and both rights are needed).	Check the modules and rights — see the permit report article.
“No permit was open during the window.”	The filter and period found no open permit.	Widen the period or remove narrowing filters.

Related

Break permits down: the permit reportSet the filter here; this page opens from it.

Permit metrics, permit breakdown tiles and the recipeThe peak as a dashboard metric, and its limits.