lead time / heat
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lead time
The period of time available before an event, project, or deadline for preparations.
Wir brauchen mindestens zwei Wochen Vorlauf, um die Konferenz zu organisieren.
We need at least two weeks of lead time to organize the conference.
The word consists of 'vor' (before) and 'Lauf' (run, process). The basic idea is always 'something that runs or takes place beforehand': the time before an appointment, the race before the final, or the liquid before the main product.
Bitte plane genug Vorlauf für unvorhergesehene Probleme ein.
Please plan in enough lead time for unforeseen problems.
The context makes the meaning clear. In connection with projects and deadlines, it means preparation time. In sports, it is a qualifying round. In chemistry or alcohol production, it is a technical term.
Der Läufer schonte seine Kräfte im Vorlauf für das Finale.
The runner conserved his energy in the heat for the final.
In the most common meaning (preparation time), 'Vorlauf' (lead time) is often combined with verbs like 'brauchen' (to need) or 'haben' (to have). The duration is given with the preposition 'von'.
Für die Planung der Hochzeit brauchen wir einen Vorlauf von mindestens einem Jahr.
For planning the wedding, we need a lead time of at least one year.
finale / final
'das Finale' and 'der Vorlauf' are clear opposites in sports. 'der Vorlauf' (heat) comes early in the competition and is used to find the best participants for the next round or for the final. 'das Finale' comes at the end and decides the victory. So 'Vorlauf' is a qualification round, while 'Finale' is the last decisive round. This difference is especially important in races and tournaments.
Im Vorlauf schwimmt Lena schnell genug und erreicht die nächste Runde.
In the heat, Lena swims fast enough and reaches the next round.
Im Finale spielt unsere Mannschaft gegen den stärksten Gegner des Turniers.
In the final, our team plays against the strongest opponent in the tournament.