Definition
Probe Lagging Overcorrection, PLO, describes an operational pattern where a roaster corrects a delayed curve response before the previous energy decision has fully expressed.
PLO is rooted in Thermal Absorption Lag (TAL). A visible curve may not show the result of an energy decision immediately. If that delay is misread as non-response, repeated correction can compound into delayed overshoot or energy-continuity damage.
The purpose of this entry is to explain how misreading TAL can route a batch toward Energy Gap BT Stall (EGBS), False Alive Cup (FAC), or Structural Flattening (SF). It does not publish a machine-specific correction sequence.
Case Pattern
In documented cases, the operator observed a delayed curve response and made repeated corrections before the previous energy decision had fully expressed.
The resulting cup showed reduced temperature-stage differentiation, heavier sweetness, and a flatter structural arc. This pattern is consistent with energy-continuity damage that may route toward SF or FAC.
The public record intentionally abstracts the underlying batch parameters, timing specifics, and operational details.
Mechanism
TAL describes the delay between an operator input and its visible expression in the bean-temperature curve. PLO occurs when that delay is interpreted as failure and another correction is applied before the previous decision has fully expressed.
Each added correction increases the chance that energy expression will arrive late and compound near the terminal phase. The resulting cup may lose structural differentiation across temperature stages.
PLO is not a roasting system failure. It is an interaction failure between judgment and delayed thermal expression.
Distinction from Related Conditions
PLO vs. EGBS: EGBS describes an energy-continuity boundary or gap. PLO describes repeated correction during delayed response. Both can route toward SF or FAC, but their diagnostic direction is different.
PLO vs. TAL: TAL is the delay mechanism. PLO is the misreading of that mechanism.
PLO vs. Session Thermal Inflation: Session Thermal Inflation describes cross-batch thermal drift. PLO is a within-batch operational entry concept. They should not be diagnosed as the same condition.
Prevention
PLO is prevented by recognizing delayed response before adding another correction. The operator must decide whether the previous energy decision has fully expressed before taking the next action.
The public page does not disclose timing windows, profile recipes, or operational details.
System Role
PLO is an operational entry concept, not a core ontology term. It routes troubleshooting back to Thermal Absorption Lag (TAL), Energy Gap BT Stall (EGBS), Observation Progression (OP), and Cup-Driven Maturity (CDM).