| Título: | The J-chart : a simple plot that combines the capabilities of Shewhart and cusum charts, for use in analytical quality control |
| Autores: | THOMPSON, MICHAEL |
| Tipo de documento: | texto impreso |
| Editorial: | Cambridge [REINO UNIDO] : Royal Society of Chemistry, 2003 |
| Colección: | AMC Technical Brief, num. 12 |
| ISBN/ISSN/DL: | 29718 |
| Dimensiones: | 2 p. |
| Nota general: | ISBN: |
| Langues: | Inglés |
| Clasificación: | |
| Resumen: | Internal quality control (IQC), based on the interpretation of results from the analysis of one or more control materials in every analytical run, is an essential part of routine analysis. The interpretation of the results is usually based on the well-known Shewhart and cusum charts.1 The J-chart (or zone control chart)2, 3 is a very useful but little known alternative. It combines the information provided by both of the traditional charts, very effectively detecting both abrupt changes and drift in the result obtained. It is easy to set up and apply. Although computer-based implementations exist, the J-chart is equally well suited to manual charting methods. |
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