The Proceedings of the BIRS Community


Statistical process controls are often used for monitoring processes to identify special causes of variation. Signals generated can assess the operational status of equipment and indicate when corrective action is needed. Control charts are a major tool in statistical process controls used in pharmaceutical manufacturing. It uses graphs as a statistical means of expressing the quality of a process or product. Quality improvement is inversely proportional to variability so that decreasing variabilities in product or process increases quality. Medicines testing laboratories employ various equipment to conduct analysis and generate reports to confirm a sample’s disposition. To ensure data integrity, laboratory equipment is routinely calibrated. In many low-income countries, this causes a great financial burden. This study, therefore, investigated the use of control charts to monitor the performance of laboratory equipment in between calibrations schedules. Also, to explore the use of the R, x., and s charts as an improvement over the use of 2SD and 3SD charts employed in earlier work.