TY - JOUR T1 - An Approach for the Reporting of Microbiological Results from Water Systems JF - PDA Journal of Pharmaceutical Science and Technology JO - PDA J Pharm Sci Technol SP - 231 LP - 237 VL - 58 IS - 4 AU - Tim Sandle Y1 - 2004/07/01 UR - http://journal.pda.org/content/58/4/231.abstract N2 - Many statistical textbooks lend themselves readily to the analysis of physical and chemical data. This is due to the material gathered from such analyses, following, in most cases, normal distribution. Normally distributed data can be examined over time to allow the obtained profile to be studied for variation. Microbiological data rarely follows such distribution. However, such approaches can be adapted for non-normally distributed (or skewed) microbiological data. This paper applies Shewhart Control Charts to the trend analysis of microbiological data from two different pharmaceutical water systems. ER -