PS-REC-125 · r4 RECOVERY INFERRED OBSERVED

FIRST ACTION UNDER ALARM

The move made with the least known is the one everything after it stands on.

01 DEFINITION

Condition in which the earliest response to an exception is taken when least is understood about it, and that response narrows what the later and better-informed responses can be.

02 CONDITIONS

UNCERTAINTY MISSING What is happening is least known at the moment the first move is required.

TIME PRESSURE SHORT The window for the first move closes before understanding arrives.

ERROR ASYMMETRY DEFERRED A foreclosing first move costs nothing at the time and everything later.

OPERATOR STATE DEDICATED The person is on it and is the one whose first move it is.

03 WHERE IT APPEARS

MEDICALThe opening intervention is chosen before the picture is complete and shapes everything after it.

ENERGYThe first switching decision is taken in seconds and constrains the rest of the response.

MOBILITYThe first control input is made on the least information and determines what remains possible.

MANUFACTURINGThe first stop decision is made before the cause is known and sets the recovery that follows.

PUBLIC SERVICEThe first classification of an incident governs the response long after better information arrives.

CONSTRUCTIONThe first action on site is taken with the least understanding of what happened.

04 WHERE THIS IS SURFACING

This surfaces wherever response is time-bound and understanding is not. Training and interfaces both concentrate on the first action, which is the action taken with the least to go on.

The question it keeps returning to is what a first move is allowed to foreclose — a reversible opening does less about a situation that may not wait, and a decisive one commits everything after it to a reading formed in the first seconds.

05 LINKED TERMS

PS-DET-001 ALARM FATIGUE PS-CLS-027 CLASSING UNDER TIME LIMIT PS-PRI-045 USED NOW IS GONE LATER PS-MOD-068 TRANSITION UNDER LOAD PS-SUP-081 INTERVENTION TIMING PS-REC-120 RECOVERY PATH AMBIGUITY PS-REC-121 EXCEPTION WITHOUT PROCEDURE PS-REC-123 CASCADING FAULT ISOLATION PS-REC-133 RESTART SIDE EFFECT PS-LOD-207 CAUSE REMOVES THE CAPACITY PS-TRU-211 WARNING BESIDE THE BUTTON