maximum value
Used in mathematics, statistics, computing, and general contexts to refer to the largest value in a set or range.
Please find the maximum value of this function.
The maximum temperature was 35 degrees.
Adjectival noun meaning 'maximum' or 'greatest'. 最大値 is the noun form specifically for a value.
Compound of 最大 (maximum) + 値 (value). A straightforward technical term.