PI Statistical Quality Control (SQC)

Create and view SQC charts in PI ProcessBook.

Features

  • Maintain operational quality through control charts that have upper and lower control limits
  • Monitor process variables efficiently
  • Examine natural versus unnatural performance fluctuations.
Detailed information available on SQC symbols
PI SQC symbol showing control limits on trend and histogram
Detailed information available on SQC symbols
Click to enlarge image
PI SQC symbol showing control limits on trend and histogram
Click to enlarge image

Benefits

  • Develop models to predict operational behavior.
  • Significantly reduce laboratory testing
  • Improve the use of human resources
  • Establish baselines ( Control Limits) using data representing “good operating conditions.”

      Example of Product Implementation

Business Challenge

Methanex is a chemical company that needed to monitor and manage operations to ensure consistency and to safely produce the highest quality product possible. They wanted to maintain their leadership position in the methanol production world market.

Implementation

The PI System requires extremely low levels of support, allowing users to easily develop and adapt applications from one screen with minimal tools. This company decided to use SQC to do improve their process with one tool.

Customer Result/Benefit

The customer found an increase in plant reliability. Since the partnership with OSIsoft, the methanol product has consistently met quality specifications The amount of analyses required for all three plants dropped from 3687 to 600 analyses/year and they managed to save six hours/day in laboratory personnel time to analyze samples.