Ascertainment (noun)

The act or process of establishing or discovering something with certainty.

Origin:

Late middle english, from the old french astreinte, from astreindre, "to bind", from latin astringere, "to bind, restrain".

Examples:

1. Ascertainment of the facts of the case was necessary before the judge could make a decision.
2. The ascertainment of the cause of the explosion is still ongoing.
3. Ascertainment of the winner was a difficult task due to the close competition.
4. Ascertainment of the true worth of the painting was made by a professional appraiser.
5. The ascertainment of the size of the market for this product is crucial for the success of the company.