Sport utility vehicle body and tall interior packaging, a high seating position and center of gravity, and available all-wheel drive for off-road capability. Some SUVs include the towing capacity of a pickup truck with the passenger-carrying space of a minivan or large sedan. The traditional truck-based SUV is more and more being supplanted by unitary body SUVs and crossovers based on regular automobile platforms for lighter weight and better fuel efficiency. In some countries, notably the United States, SUVs are "not" classified as cars, but as "light trucks". SUVs overtook lower medium segment cars to become the world's largest automotive segment in 2015,
Process capability index mean is T, the estimated mean of the process is formula_1 and the estimated variability of the process (expressed as a standard deviation) is formula_2, then commonly accepted process capability indices include: formula_2 is estimated using the sample standard deviation. Process capability indices are constructed to express more desirable capability with increasingly higher values. Values near or below zero indicate processes operating off target (formula_1 far from T) or with high variation. Fixing values for minimum "acceptable" process capability targets is a matter of personal opinion, and what consensus exists varies by industry, facility, and the process under consideration. For