der Idealfall
ideal case
The best possible, most desirable situation or the most favorable of all conceivable cases.
Im Idealfall sind wir mit dem Projekt schon morgen fertig.
Ideally, we’ll be finished with the project by tomorrow.

ideal case
Loading your saved state.
ideal case
The best possible, most desirable situation or the most favorable of all conceivable cases.
Im Idealfall sind wir mit dem Projekt schon morgen fertig.
Ideally, we’ll be finished with the project by tomorrow.

The word is made up of the adjective 'ideal' and the noun 'der Fall' (the case). So it literally describes a case or situation that is perfect or the best possible.
Der Idealfall wäre, wenn wir das Projekt ohne zusätzliche Kosten abschließen.
The ideal case would be if we completed the project without additional costs.
The phrase 'Im Idealfall' (ideally / in the ideal case) very often appears at the beginning of a sentence. When it is in position 1, the conjugated verb follows directly in position 2 (inversion).
Im Idealfall ist die Wohnung bis nächste Woche renoviert.
Ideally, the apartment will be renovated by next week.
'Idealfall' (ideal case) is frequently used in discussions about plans and expectations. It describes the best outcome, often to distinguish it from a more realistic or worse possibility.
Im Idealfall scheint die Sonne, aber wir sollten für den Ausflug auch Regenjacken einpacken.
Ideally, the sun will be shining, but we should also pack rain jackets for the trip.
normal case
'der Regelfall' and 'der Idealfall' sound similar, but they do not mean the same thing. 'der Regelfall' describes what normally happens. That can be good, bad, or simply average. 'der Idealfall' describes what would be best or most favorable. Learners may confuse the words because both talk about a possible case. The important difference is: 'Regelfall' is about reality in normal everyday life, while 'Idealfall' is about the best desired situation.

Im Idealfall habe ich im Sommer genug Zeit für einen langen Spaziergang in der Stadt.
Ideally, I have enough time in the summer for a long walk in the city.
Am Montag treffen wir uns im Regelfall in der Pause.
On Mondays, we normally meet during the break.