die Umsetzung
implementation
The realization or execution of a plan, idea, or project in practice.
Die Umsetzung des Bauprojekts verlief langsamer als geplant.
The implementation of the construction project went more slowly than planned.

implementation / conversion
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implementation
The realization or execution of a plan, idea, or project in practice.
Die Umsetzung des Bauprojekts verlief langsamer als geplant.
The implementation of the construction project went more slowly than planned.

The noun 'die Umsetzung' (implementation/conversion) is derived directly from the verb 'umsetzen' (to implement). The verb means to put an idea or plan into action. The ending '-ung' turns the verb into a feminine noun.
Wir müssen diesen Plan so schnell wie möglich umsetzen.
We have to implement this plan as quickly as possible.
In the context of projects and plans, 'Umsetzung' (implementation) is often used with verbs such as 'gelingen' (to succeed), 'scheitern' (to fail), 'planen' (to plan), or 'vorantreiben' (to push forward). Typical adjectives are 'erfolgreich' (successful), 'schnell' (quick), or 'schrittweise' (step-by-step).
Die schrittweise Umsetzung der Reform hat begonnen.
The step-by-step implementation of the reform has begun.
To say what is being implemented, you usually use the genitive or a 'von' construction. The genitive is more common in written language.
Die Umsetzung des neuen Gesetzes erfordert Zeit.
The implementation of the new law requires time.
You can recognize the chemical meaning from signal words such as 'chemisch' (chemical), 'Stoffe' (substances), 'Reaktion' (reaction), or the names of elements. In almost all other contexts, it is about the realization of a plan.
Die vollständige Umsetzung des Zuckers in Alkohol dauert mehrere Tage.
The complete conversion of sugar into alcohol takes several days.
practice / office
'die Praxis' and 'die Umsetzung' are both connected to an idea becoming something real. 'Praxis' describes more the area of practical action in contrast to theory. 'Umsetzung' describes the step or process in which a plan is actually carried out. So you might say: An idea should come into practice, and the implementation shows how that is done. 'Praxis' is the practical area; 'Umsetzung' is the carrying out of a concrete plan.

Bei der Umsetzung des Projekts gab es am Anfang einige Probleme.
There were a few problems at the beginning during the implementation of the project.
Im Kurs lernen wir nicht nur Regeln, sondern üben sie auch in der Praxis.
In the course, we do not just learn rules; we also practice them in practice.