Acceptance Tolerance relation to Maintenance Tolerance

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Acceptance Tolerance relation to Maintenance Tolerance

Acceptance tolerance is the tighter limit used to decide whether a part is acceptable after final inspection, while maintenance tolerance defines how much variation can be introduced during repair or adjustment and still bring the part back to spec. The final acceptance window sits inside the broader maintenance window, so the accepted variation is smaller. That relationship means the acceptance tolerance is half of the maintenance tolerance. For example, if maintenance tolerance allows ±6 units from nominal, the acceptance tolerance would be ±3 units. This ensures that, even if maintenance causes up to 6 units of deviation, the final measurement must still lie within the narrower ±3-unit acceptance range to be approved.

Acceptance tolerance is the tighter limit used to decide whether a part is acceptable after final inspection, while maintenance tolerance defines how much variation can be introduced during repair or adjustment and still bring the part back to spec. The final acceptance window sits inside the broader maintenance window, so the accepted variation is smaller. That relationship means the acceptance tolerance is half of the maintenance tolerance.

For example, if maintenance tolerance allows ±6 units from nominal, the acceptance tolerance would be ±3 units. This ensures that, even if maintenance causes up to 6 units of deviation, the final measurement must still lie within the narrower ±3-unit acceptance range to be approved.

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