valmistettuilla

Valmistettuilla is a form you may encounter in Finnish, but it is not considered the standard spelling in contemporary grammar. The normative plural adessive form of the past participle val­ma­sti­tettu (prepared, produced) is valmistetuilla. The word valmistettuilla is typically described as a potential nonstandard variant or a common misspelling that arises from uncertainty about how the participle stem combines with the adessive plural suffix -lla/-illä.

In Finnish, val­mistettu is a past participle that functions as an adjective meaning prepared or manufactured. When describing multiple items in the adessive case (on/at/on top of the prepared ones; with the prepared ones), the adjective takes the plural adessive form valmistetuilla, attaching -lla to the stem after standard inflection rules. The resulting phrase serves as part of a noun phrase, often with a noun in plural, such as tuotteilla (products with/on the prepared ones) or osilla (with the prepared components).

Usage notes:

- Valmistetuilla is the recommended form in formal and standard Finnish.

- Valmistettuilla may appear in informal writing, typographical errors, or under imperfect knowledge of Finnish morphology.

- The exact meaning is context-dependent and relies on the understood noun being described (e.g., valmestetuilla tuotteilla = with the prepared products).

Examples:

- Valmistetuilla tuotteilla on parempi jäljitettävyys.

- Kone, joka on varustettu valmistetuilla osilla, täyttää standardit.

See also: Finnish grammar, participles in Finnish, adjective declension, adessive case.

In summary, valmistettuilla is generally treated as a nonstandard variant of the standard val­mistetuilla, which is the correct plural adessive form of the Finnish past participle used to describe multiple items in a prepared state.