
The authors present a simple-to-use Microsoft Excel-based statistical tool that uses cumulative sum techniques to aid retrospective understanding of data trends.
Robert Shaw is principal scientist statistics, Oral Product Development, Operations, AstraZeneca Pharmaceuticals, Macclesfield, Cheshire, United Kingdom, SK102NA, [email protected].

The authors present a simple-to-use Microsoft Excel-based statistical tool that uses cumulative sum techniques to aid retrospective understanding of data trends.