The translation of a process design from the laboratory or experimental scale to the larger pilot plant scale, or commercial or industrial scale. Scale-up is an important part of commercializing a process in which it is accepted that theoretical design cannot be used alone to achieve this. Dimensionless numbers or groups are a useful way of scaling up a process since certain heat, mass, and momentum transfer phenomena are independent of scale. For example, in mixing processes, it may be necessary to ensure that the power-to-volume ratio remains the same between lab-scale and full-scale to ensure homogeneous mixing characteristics. The scaled-up equipment is also assumed to have geometric similarity. The testing of a small-scale process is therefore quick, cost-effective, and reliable such that the experimental information gained can be reliably used on a larger scale.