AWWA WQTC64099

This project evaluated options for improving the processes used in quality assurance andcontrol of water quality data captured by sensors, transferred to supervisory control and data acquisition (SCADA) and thenprocessed into a data warehouse for wider use. As a result of this effort, complexities inthe data and in the operations of a large multiple source utility were identified that limitthe effective use of normal control ranges for performing quality control. The result ofthe project was the development of a tool that allows a knowledgeable technical person(the Quality Control Reviewer) to establish control limits for individual parameters andsensors during specific operational conditions. These can be stored and managed by thesoftware for easy recall by the Quality Control Reviewer (QCR). In this process thequality control system is used as a screening tool to identify data records that may be ofconcern and need further review. The screens include control limits, operational limits,instrument detection limits and differences between adjacent measurements. Thesystem successfully passes most of the data but flags data that need detailed review.The QCR can quickly review data and evaluate flagged data points, and then either failor pass these data. No data points are deleted but failed data points are stored off lineand are only accessible to a subset of the users. The system gives the QCR access tohistorical data which can be visualized or summarized to support decisions on qualitycontrol limits. Includes reference, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2006

Number of Pages:

18

File Size:

1 file , 850 KB