Run chart
Is on-time ship drifting, before any control limit is claimed?
The dashed line is the median, 82.5. The solid line is the target, 97. This sheet has no control limits.
How this sheet sits with the others
Every listed week is under the target of 97. The median of the twelve weekly percents is 82.5. On-time ship across the window is 82 percent. This sheet has no control limits, so a low week is not yet a signal.
- What it makes visible
- The twelve weekly on-time percents, the median, and the target.
- When it is useful
- When someone wants the direction of on-time ship before calling a point a signal.
- Who uses it
- Helen Ward, against the promise day Ruth Adeyemi’s crew is booked to.
- What it takes
- The weekly on-time percents for the twelve weeks ending Friday 2 October 2026.
- What it leaves
- A window at 82 percent on time, a median of 82.5, and a target of 97. No control limits.
- The underlying record
- The weekly on-time percent for the promise Helen Ward recorded, its median, and Ruth Adeyemi's target are the series the control chart and the Friday board later take up, still without a limit here.
Where these facts go next
What this sheet still leaves out
It cannot say whether a point is a signal.