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Real-time Exceptional Events Management for a Partial Continuous Dry Granulation Line

  • Research Article
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Abstract

Purpose

This study focuses on the implementation of a real-time exceptional events management (EEM) framework on a pharmaceutical manufacturing process to demonstrate its efficacy in detecting, diagnosing, and mitigating incipient exceptional events on a continuous process.

Methods

The real-time EEM framework integrates signed directed graph and trend analysis methods for diagnosis. Additionally, fast Fourier transform analyses are performed via a parallel moving window to detect oscillatory behavior. The EEM framework is demonstrated on a partial continuous dry granulation line consisting of two feeders, blender, and roller compactor and is shown to be capable of incipient fault diagnosis. In addition, simultaneous occurrences of different exceptional events are considered in this study, and a protocol is developed for multiple fault identification.

Results

The framework is observed to detect, diagnose, and offer mitigation strategies within 10 s of event inception for the following cases: (1) simultaneous occurrences of different exceptional events in a particular, isolated, equipment, (2) simultaneous occurrences of different exceptional events spanning multiple equipment, and (3) consecutive occurrences of events. Additionally, the EEM framework is capable of limiting the progression of exceptional events originating in an upstream equipment, thus ensuring minimal to no propagation of exceptional events. Once an exceptional event has been determined, mitigation strategies are retrieved from the knowledge base and are either presented to the operator as an advisory or automatically executed to restore normal operating conditions.

Conclusions

The real-time EEM framework is demonstrated to effectively detect, diagnose, and mitigate known exceptional events using built-in process knowledge. In addition, a protocol for handling multiple fault identification is successfully demonstrated on the partial continuous dry granulation line. Finally, quick and effective remediation of an exceptional event as it begins is shown to prevent the propagation of its effects downstream, thus reducing subsequent deviations across the continuous line.

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Notes

  1. Preema red powder food coloring ingredients: sodium chloride, ponceau 4R (red synthetic colorant), and tartrazine (lemon yellow synthetic colorant)

  2. Normal operating conditions of roller compactor variables were subtracted from actual measurements

  3. Residence time estimates were based on Table 3 using equipment settings described in “Experimental Method for Continuous Dry Granulation Line.”

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Acknowledgments

The authors would like to acknowledge the National Science Foundation funding for the Engineering Research Center for Structured Organic Particulate Systems (ERC-SOPS). The authors would also like to thank Girish Joglekar for his expertise and advice in ontologies, and Ryan McCann and Arun Giridhar whose help has been essential to the success of this study.

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Authors and Affiliations

  1. The Dow Chemical Company, 2301 N Brazosport Blvd, Freeport, TX, 77541, USA

    Intan Munirah Hamdan

  2. Purdue University School of Chemical Engineering, 480 Stadium Mall Dr, West Lafayette, IN, 47907, USA

    Gintaras V. Reklaitis

  3. Columbia University Department of Chemical Engineering, 500 W 120th St, New York, NY, 10027, USA

    Venkat Venkatasubramanian

Authors
  1. Intan Munirah Hamdan
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  2. Gintaras V. Reklaitis
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  3. Venkat Venkatasubramanian
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Corresponding author

Correspondence to Gintaras V. Reklaitis.

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Hamdan, I.M., Reklaitis, G.V. & Venkatasubramanian, V. Real-time Exceptional Events Management for a Partial Continuous Dry Granulation Line. J Pharm Innov 7, 95–118 (2012). https://doi.org/10.1007/s12247-012-9138-6

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  • DOI: https://doi.org/10.1007/s12247-012-9138-6

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