
die Realisierung
implementation
The implementation or realization of an idea, plan, or project in practice.
Die Realisierung des neuen Stadtparks wird mehrere Jahre dauern.
The implementation of the new city park will take several years.
realization / implementation
Loading your saved state.

implementation
The implementation or realization of an idea, plan, or project in practice.
Die Realisierung des neuen Stadtparks wird mehrere Jahre dauern.
The implementation of the new city park will take several years.

realization
The sudden understanding or grasping of a situation; the realization.
Die Realisierung, dass sie den Zug verpasst hatte, kam erst am leeren Bahnsteig.
The realization that she had missed the train only came on the empty platform.

conversion into cash
In business, the conversion of assets, such as stocks or real estate, into money.
Die Realisierung der Kursgewinne erfolgte durch den Verkauf des gesamten Aktienpakets.
The realization of the capital gains took place through the sale of the entire stock package.
Careful: The main meaning of 'Realisierung' (implementation/realization) in German is the implementation of a plan. The meaning 'Erkenntnis' (realization), as in English 'realization', is less common and often formal. In everyday language, 'Erkenntnis' (realization/insight) or 'das Begreifen' (understanding) is more likely to be used for this.
Die Realisierung der neuen Brücke ist unser wichtigstes Ziel.
The implementation of the new bridge is our most important goal.
'Realisierung' (realization/implementation) is derived from the verb 'realisieren' (to realize/implement). The ending '-ung' forms a feminine noun that describes the process or result of the action.
Wir müssen den Plan erst vollständig ausarbeiten, bevor wir ihn realisieren können.
We first have to work out the plan completely before we can implement it.
In the meaning 'Umsetzung' (implementation), 'Realisierung' (implementation/realization) is often combined with plans or projects. Typical phrases are 'die Realisierung eines Vorhabens' (the implementation of a project), 'an der Realisierung arbeiten' (to work on the implementation), or 'die Realisierung unterstützen' (to support the implementation).
Viele Freiwillige halfen bei der Realisierung des neuen Spielplatzes.
Many volunteers helped with the implementation of the new playground.
When 'Realisierung' (realization) describes an insight or realization, it is often followed by a subordinate clause with 'dass' (that). This structure explains exactly what was understood.
Die Realisierung, dass er einen großen Fehler gemacht hatte, war schmerzhaft.
The realization that he had made a big mistake was painful.
The meaning 'Umwandlung in Geld' (conversion into money) is technical language from business and finance. For example, people speak of the 'Realisierung von Gewinnen' (realization of gains) or the 'Realisierung von Vermögenswerten' (realization of assets).
Der Investor wartet auf den richtigen Zeitpunkt für die Realisierung seiner Gewinne.
The investor is waiting for the right time to realize his gains.
implementation / conversion
Both words refer to putting a plan or project into action. Umsetzung places more emphasis on the practical steps and the process of carrying it out, while Realisierung emphasizes that the planned result becomes reality. Umsetzung is usually suitable for specific steps of work, while Realisierung can also refer to the result achieved.

Die Realisierung des neuen Schulplans zeigt sich im nächsten Monat an den zusätzlichen Unterrichtsräumen.
The realization of the new school plan will be evident next month in the additional classrooms.
Die Umsetzung des neuen Schulplans beginnt im nächsten Monat mit zusätzlichen Unterrichtsräumen.
Implementation of the new school plan will begin next month with additional classrooms.