die Anfertigung
production
The process of making or producing something, often to order or according to specific requirements.
Die Anfertigung des Maßanzugs dauerte mehrere Wochen.
The production of the tailored suit took several weeks.

production / creation
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production
The process of making or producing something, often to order or according to specific requirements.
Die Anfertigung des Maßanzugs dauerte mehrere Wochen.
The production of the tailored suit took several weeks.

'Anfertigung' (production/creation) is derived from the separable verb 'anfertigen' (to make/produce), which means 'herstellen' (to manufacture) or 'erstellen' (to create). The verb is often used for custom-made products or official documents.
Der Schreiner hat den Schrank nach meinen Wünschen angefertigt.
The carpenter made the cabinet according to my wishes.
The context tells you whether the manufacturing process or the finished product is meant. If it is about duration ('die Anfertigung dauert' — the production takes time), the process is meant. If it can be handed in or counted ('eine Anfertigung einreichen' — to submit a piece of work), the product is meant.
Die Anfertigung der Prototypen dauert zwei Wochen.
The production of the prototypes takes two weeks.
When the manufacturing process is meant, 'Anfertigung' (production) often appears with the preposition 'von' (of) and the material or product. A common phrase is also 'die Anfertigung von etwas in Auftrag geben' (to commission the production of something).
Wir haben die Anfertigung der neuen Broschüren in Auftrag gegeben.
We commissioned the production of the new brochures.
production
'die Produktion' and 'die Anfertigung' both have to do with making something. 'Produktion' is more appropriate when goods are made in larger quantities or in a company. The word often sounds industrial or organizational. 'Anfertigung' is used more when something is made individually, to order, or according to precise specifications. Learners may confuse the words because both refer to the production process. A simple guide is: many identical products come from 'Produktion'; a special individual piece is created through 'Anfertigung'.

Für die Anfertigung des Regals braucht der Tischler genaue Maße.
The carpenter needs exact measurements to make the shelf.
Die Produktion der neuen Fahrräder beginnt nächste Woche in der Fabrik.
Production of the new bicycles begins next week at the factory.