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Method and system for monitoring batch product manufacturing

  • US 8,972,037 B2
  • Filed: 01/25/2012
  • Issued: 03/03/2015
  • Est. Priority Date: 12/31/2003
  • Status: Expired due to Fees
First Claim
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1. A system for monitoring a product through a batch manufacturing plant, comprising:

  • a plurality of holding units configured to store a product, wherein at least some of the units can be individually decontaminated;

    a plurality of logical representations of the units, wherein a new logical representation of a unit is created upon decontamination of the unit;

    a plurality of records that identify when a first unit started and stopped feeding into a second unit; and

    at least one tracing component configured to identify one or more source units that could have fed into a target unit based at least in part on start and stop times of feedings stored in the plurality of records, wherein the determination is iteratively applied so as to identify both direct source units that could have directly fed into the target unit and indirect source units that could have fed into the direct source units;

    wherein the system collects data from at least one programmable logic controller (“

    PLC”

    ) using a process that includes adding a checksum to PLC data points within a transaction, collecting the checksum and the PLC data points, and verifying the checksum.

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