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Wilk Strategy · tools

The interval wall.

Nine contacts land in a ninety-minute window. The model books each one in the interval where it begins. The floor holds it until it ends. Shorten the ruler and the two readings drift apart, the same nine contacts read across more and more walls, and once the ruler is shorter than the work itself, not one contact fits inside a single interval.

The numbers here are simulated. Move them.

The same day under different rulers

The ruler

Wall lines redraw at the new length. The nine contact bars never move.

The work

How long each contact runs once it starts. The wall can be crossed from either direction: stretch the work past the ruler, or shrink the ruler under the work.
Cross a wall
5 of 9
56% of the day’s contacts
Mean walls crossed
0.56
per contact, this day
Intervals under-read
2 of 3
touched exceeds booked

the ruler is longer than the work

a contact, start to finish booked: the interval it starts in touched: every interval it is present in under-read interval
the day: nine contacts, starts fixedcontact 1: starts at minute 2, runs 18 minutes, crosses 0 wallscontact 2: starts at minute 14, runs 18 minutes, crosses 1 wallcontact 3: starts at minute 21, runs 18 minutes, crosses 1 wallcontact 4: starts at minute 26, runs 18 minutes, crosses 1 wallcontact 5: starts at minute 34, runs 18 minutes, crosses 0 wallscontact 6: starts at minute 48, runs 18 minutes, crosses 1 wallcontact 7: starts at minute 55, runs 18 minutes, crosses 1 wallcontact 8: starts at minute 63, runs 18 minutes, crosses 0 wallscontact 9: starts at minute 70, runs 18 minutes, crosses 0 wallsminutes 0–30: booked 4, touched 44minutes 0–30: booked 4, touched 44minutes 30–60: booked 3, touched 6, under-read3minutes 30–60: booked 3, touched 6, under-read6minutes 60–90: booked 2, touched 4, under-read2minutes 60–90: booked 2, touched 4, under-read4bookedtouched0153045607590minutes into the window

The separation curve

01234604530155walls crossed per contact, this dayinterval length in minutes. The ruler shortens to the right60-minute intervals: 0.22 walls crossed per contact55-minute intervals: 0.11 walls crossed per contact50-minute intervals: 0.22 walls crossed per contact45-minute intervals: 0.11 walls crossed per contact40-minute intervals: 0.44 walls crossed per contact35-minute intervals: 0.56 walls crossed per contact30-minute intervals: 0.56 walls crossed per contact25-minute intervals: 0.67 walls crossed per contact20-minute intervals: 0.78 walls crossed per contact15-minute intervals: 1.11 walls crossed per contact10-minute intervals: 1.67 walls crossed per contact5-minute intervals: 3.44 walls crossed per contactcurrent: 30-minute intervals, 0.56 walls crossed per contact30 min · 0.56
The model books a contact in the interval it began. The floor is still working it in the next one. Precision on arrivals is not accuracy about the floor. Shorten the interval far enough and wall crossings multiply without adding a minute of work, and the two readings drift apart while the day stays exactly the same. The numbers here are simulated.
View the counts as a table
Booked and touched per interval: 30-minute intervals, an 18-minute handle time. Touched sums to 14 against 9 booked because a contact that crosses a wall is read again in every interval it reaches: more reads, never more work.
IntervalBookedTouchedUnder-read by
0–30 min44–
30–60 min36+3
60–90 min24+2
sum of reads914+5