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Time-in-State Metric

This presentation explains how to implement a management and control methodology on the plant floor in real-time to improve the Time-in-State Metric (TISM). The presentation also explains what tools the operators will require to guide them in making the most effective decisions and how these tools need to be maintained and calibrated.
The design of tools to monitor and manage Time-in-State Metrics is based on the principles of interpretation of data leading to valuable information, and the design of high-performance HMI systems. Also important to the design and operation of tools for TISM is the understanding of methodologies to be employed when the process is out-of-optimum and needs to be brought back to ideal state. The design of these systems in the process industry needs to take into account that changes to operating parameters can take some time to manifest. Multiple adjustments made to rectify an out-of-optimum situation should not be made in quick succession.

Finally a few suggested artifacts from recent projects will be presented to illustrate the use of TISM data by different roles in the process manufacturing plant. This will show how information is aggregated according to the ISA-95 equipment hierarchy and the level of responsibility interest area of the user accessing the information.