English to German Law/Patents Law: Contract(s) supply agreement

Aus einem Liefer- und Abnahmevertrag (US-Firma liefert Rohstoffe, deutscher Hersteller kauft.)

"Maximum Supply Obligations. The obligation of [manufacturer] to supply any grade of Product to Customer under this Agreement shall not exceed, (i) in any single month, a quantity in excess of one-fifth (1/5) of the applicable annual forecasted quantity in such year for such grade, or, (ii) in any Term Year, a quantity in excess of 120% of the quantity forecasted for such grade for such Term Year (the “Maximum Volume”). If Customer shall request volumes of Product in excess of the Maximum Volumes, [manufacturer] shall use commercially reasonable efforts to supply such volumes (“Excess Volumes”); provided that [manufacturer] shall not be obligated to breach its contractual obligations with other customers or to take any actions that it deems detrimental to its business, in order to supply Customer with Excess Volumes. [Manufacturer's] failure to supply Excess Volumes shall not be deemed to be a material breach of the terms of this Agreement."

Im Klartext: Pro Vertragsjahr wird ein Forecast für das Liefervolumen erstellt, darauf basierend wird festgelegt, wieviel pro Monat/im Laufe eines Vertragsjahrs bestellt werden kann, damit der Lieferant seinen Verpflichtungen auch nachkommen kann.

Wie wird hier denn "excess volume" ordentlich übersetzt?

Vielen herzlichen Dank im Voraus!