estimation
process of finding an estimate, or approximation, which is a value that is usable for some purpose even if input data may be incomplete, uncertain, or unstable
en-GB/ˌɛstɪˈmeɪʃən/
en-US/ˌɛstəˈmeɪʃən/
process of finding an estimate, or approximation, which is a value that is usable for some purpose even if input data may be incomplete, uncertain, or unstable