Description
Calculate slack to a supplied trip-return deadline.
Geographic activity records depend on location precision, boundary vintage, observation time, population denominator and access-window conventions. A travel-time budget differs from actual accessibility, and rectangular cell area does not establish privacy. Local shares and labels need the original survey and spatial definitions.
Calculate slack to a supplied trip-return deadline.
When to use this tool
Use Accessibility Trip Return Deadline Slack when you already have returnTime, suppliedDeadline and need to calculate slack to a supplied trip-return deadline.
How to use the tool and how it works
- Enter returnTime, suppliedDeadline. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read slack, onTime. Inspect onTime before interpreting the associated values.
Return deadline-returnTime and flag returnTime<=deadline as onTime.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| returnTime | Return Time | Required. Finite number. |
| suppliedDeadline | Supplied Deadline | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| slack | Slack | Required. Finite number. |
| onTime | True at equality with the deadline as well as earlier returns. | Required. Boolean. |
{
"input": {
"returnTime": 15,
"suppliedDeadline": 20
},
"output": {
"slack": 5,
"onTime": true
}
}Limitations and assumptions
- Equality is on time; no route, actual deadline, accessibility, travel uncertainty or service entitlement is verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the actual route, service schedule, survey frame and boundary source when assessing mobility or access. Review disclosure across the full spatial dataset and linked records; a location label or cell-size product is not a complete privacy method.
References
Similar or alternative tools
- Activity Diary Location Precision
Label an activity-diary location transcription with a supplied precision tag.
- Commute Stop Activity Dwell Time
Measure a supplied commute-stop activity's dwell duration.