lag · temporal
feedback arriving within the window but too late for the correction to land before the next drift.
Examples
- In the 2012 Knight Capital trading glitch, feedback from delayed stock price updates arrived too late to prevent erroneous trades piling up in under 45 minutes. computing
- The Therac-25 radiation therapy machine administered lethal overdoses because software feedback about beam intensity arrived after the next cycle had already begun. engineering
- During the 2008 financial crisis, credit rating updates for mortgage-backed securities lagged behind actual defaults, missing the window to adjust investor behavior. economics
Emergence
through: The interaction of feedback, drift, temporal sequencing, a persistence window, and the notion of corrective arrival upon a parameter state enables feedback to arrive too late for correction before the next drift.
- untimely correction
- arrival within bounds but after need
- drift-correctable window
Chain to foundations
as tree
- lagL15
- windowL7
- parameterL4
- rangeL3
- boundaryL2 (shown above)
- persistL1 (shown above)
- changeL1 (shown above)
- outsideL6
- partL1 (shown above)
- driftL11
- parameterL4 (shown above)
- changeL1 (shown above)
- goL3
- makeL4
- nothingL10
- noneL9
- differenceL1 (shown above)
- amountL8
- offL2
- spaceL0 (shown above)
- differenceL1 (shown above)
- noneL9
- wayL9
- spaceL0 (shown above)
- linksL8
- partL1 (shown above)
- connectsL7
- flowL3
- interactionL2 (shown above)
- persistL1 (shown above)
- structureL2 (shown above)
- broughtL6
- happenL2
- feedbackL14
- informationL6
- differenceL1 (shown above)
- marksL5 (shown above)
- patternL0 (shown above)
- sendL8
- sourceL2
- changeL1 (shown above)
- backL13
- occursL2
- informationL6
- parameterL4 (shown above)
- lateL3
- nextL10
- timeL0 (shown above)
- landL10
- windowL7
Neighborhood
Concepts that depend on this one above; what it is built from below.
Relations
| abstracts | maintenance.upkeep | maintenance must account for lag to preserve parameters in window |
| contrasts-with | drift.aimless | drift occurs regardless of feedback; lag is about timing of corrective feedback |
| abstracts | buffer.region | lag determines minimum necessary buffer size |
| abstracts | error.mistake | uncorrected error accumulates when feedback lags |