A Box-Cox Power Transformation allows you to transform data to match a normal distribution. It is not a guarantee of normality. It is a quick way of transforming data to better fit a control chart.

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 49, No. 2 (2000), pp. 287-296 (10 pages) We analyse longitudinal data on CD4 cell counts from patients who participated in ...