Parallel time report guide
Parallel records can make segment time longer than elapsed clock time. Separate segment sum, covered union, overlap interval, and sum overcount, with labels and units—not color alone.
The synthetic Asia/Tokyo example uses A 09:00–10:00, B 09:30–10:30, and C 09:45–10:00. Show times and active counts together.
| Window | Active | Segments | Seconds |
|---|---|---|---|
| 09:00–09:30 | 1 | A | 1,800 |
| 09:30–09:45 | 2 | A, B | 900 |
| 09:45–10:00 | 3 | A, B, C | 900 |
| 10:00–10:30 | 1 | B | 1,800 |
These metrics count the same windows differently. Do not mix the 135-minute segment sum with the 90-minute clock window.
| Metric | Seconds | Minutes | Definition |
|---|---|---|---|
| Segment sum | 8,100 | 135 | A+B+C |
| Covered union | 5,400 | 90 | at least one active |
| Overlap interval | 1,800 | 30 | at least two active |
| Sum overcount | 2,700 | 45 | sum minus union |
The 09:45–10:00 interval has three active records, so the 30-minute overlap interval and 45-minute sum overcount are different.
If a record has duration but no start or end, keep union and overlap as null. Do not infer boundaries or fill them with zero.
duration: 1,200 seconds<br>start/end: null<br>union/overlap: null<br>decision: UNKNOWNSave record IDs, period, metric definitions, timeline, interval CSV, and explanation text. Billing, payroll, contract, and labor decisions are separate human decisions. This example does not decide discounts, padding, or legal obligations.
For real input, record it in the existing stopwatch and report only intervals that can be verified.