This is the 205th most frequent Finnish word.
vaiheessa
"In a phase" or "at a stage."
In this sentence, 'vaiheessa' signifies a specific stage or phase of progression.
Projekti on kehityksen vaiheessa.
The project is in the development stage.
Here, 'vaiheessa' is used to indicate the current period within a series of tasks or procedures.
Olemme nyt valmistelujen vaiheessa.
We are now in the preparation phase.
This use of 'vaiheessa' describes being in the beginning stage or phase of the process.