Keskisaika
Keskisaika is a Finnish term meaning mean time or average time. In statistics and operations research, it refers to the expected duration of a process or event, expressed as the average of observed times or as the theoretical mean of a probability distribution. Etymologically, keski- means center and aika means time.
Calculation and concept: The basic definition is the arithmetic mean of observed durations: (t1 + t2 + ... + tn)
Contexts and examples: It is used across fields to summarize how long tasks, processes, or system responses
Considerations: The keskisaika can be distorted by outliers or skewed data; in such cases the median or
See also: arithmetic mean, expected value, median, MTBF, MTTR, service level.