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AVEVA Pipeline Operations for Liquids

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Understand balance period quality

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  • Last UpdatedApr 24, 2025
  • 2 minute read

Any short-term, long-term, or extended-term period can be flagged as bad data under the Status column on the Pipeline Monitor (PLM) Control display in easy eXtended Operator Station (ezXOS). This is done if the number of intervals making up the period that were flagged as bad exceeds the configured threshold. Data quality for the periods are assessed as follows:

  1. The data quality for each device is retrieved for the current processing minute. Data quality appears as bad if the device is stale or if it is not secondpoll. Otherwise, it is considered to be of good quality.

  2. If any device appears as bad quality, the current processing minute has a bad quality. Otherwise, It is considered to be of good quality. Each minute quality is saved, up to the previous 60 minutes.

  3. Quality of any short-term interval appears as bad if the percentage of bad minutes in the interval equals or exceeds the configured threshold for the plm record. Otherwise, It is considered to be of good quality.

  4. At the top of each hour, the quality of the hour is assessed. It is invalid if the percentage of bad minutes in the hour equals or exceeds the configured threshold for the plm record. Otherwise, It is considered to be of good quality. Each hour’s quality is saved, up to the previous 24 hours.

  5. Quality of any long-term interval appears as bad if the percentage of bad hours in the interval equals or exceeds the configured threshold for the plm record. Otherwise, the quality of the long-term interval is considered to be of good quality.

  6. At the top of each day, the quality of the day is assessed. It is bad if the percentage of bad hours in the day equals or exceeds the configured threshold for the plm record. Otherwise, the data quality is considered to be of good quality. Each day’s quality is saved, up to the previous 60 days.

  7. Quality of any extended-term interval is bad if the percentage of bad days in the interval equals or exceeds the configured threshold for the plm record. Otherwise, the quality of the extended-term interval is considered to be of good quality.