järjestelmässään

Järjestelmässään is a Finnish grammatical construction meaning in their system, or in its system, depending on context. It is formed by taking the noun järjestelmä (system) in the inessive case with the suffix -ssä (in), and then adding the third-person possessive suffix -nsä/-sä, which attaches to the preceding word. The result, järjestelmässään, thus expresses location together with possession: in his/her/its/their system. The exact referent (his, her, its, or their) is determined by the surrounding context.

The form is a typical example of how Finnish uses locative cases combined with possessive suffixes to convey nuanced meaning about location and ownership. The suffix -nsä/-sä marks the possessor, while the base word remains in the inessive. Because possessive suffixes in Finnish largely indicate possessor rather than number, järjestelmässään can refer to a single subject or to a group, again depending on context.

Usage is common when describing organizations, institutions, or groups and how they structure rules, procedures, or workflows. It can convey a sense of internal logic or arrangements that are specific to that entity.

Examples:

- Yritys päivittää järjestelmässään turvallisuusohjeita. (The company updates safety guidelines in its system.)

- Hallitus on muuttanut prosessejaan järjestelmässään. (The government has changed its processes in its system.)

Related forms include other possessive-inessive constructions such as järjestelmässäni (in my system) or järjestelmässään (in his/her/its/their system). Etymologically, the spelling arises from combining the inessive -ssä with the third-person possessive suffix -nsä.