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Review of Case Materials
Reviews records, documents, testimony, data, and other relevant materials and consults with counsel regarding technical issues related to the matter.
Provide Expert Analysis
Applies specialized knowledge and experience to evaluate the technical or professional issues involved.
Form Expert Opinions
Develops independent, supportable opinions based on the available evidence and relevant standards.
Prepare Expert Reports
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PLC program and change records can help establish which logic, timers, setpoints, interlocks, input/output assignments, and configuration elements were present before, during, or after an incident. Relevant evidence may include program versions, controller uploads and downloads, engineering-workstation records, backups, audit trails, change logs, timestamps, and other configuration data. These records can be compared with equipment behavior and incident timing to determine which program version is best supported as having been in service at the relevant time, while accounting for incomplete records or uncertainty in the change history.
An unstable or poorly performing control loop can be evaluated by reviewing process-variable trends, setpoint changes, controller output, sensor response, actuator behavior, process dynamics, and tuning parameters such as proportional, integral, and derivative settings. Oscillation, excessive overshoot, slow recovery, or repeated cycling may indicate poor control performance, but those symptoms do not necessarily prove incorrect tuning. Sensor problems, actuator or control-valve behavior, process disturbances, dead time, saturation, filtering, interacting loops, or configuration errors can produce similar behavior and should also be considered.
Yes. DCS historian data can help reconstruct the sequence of a process upset by preserving process variables, controller outputs, equipment states, alarms, and events over time. The level of timing detail depends on how the historian acquired, timestamped, filtered, compressed, and stored the data. Clock synchronization, scan or sample rates, exception reporting, missing records, and tag configuration should therefore be considered before drawing conclusions about event timing or sequence.
An incorrect sensor signal can cause a control system to respond to a condition that differs from the actual physical state. Depending on the control logic and operating mode, the signal may affect actuator commands, alarms, shutdowns, interlocks, or other automated responses. Redundant measurements, range checks, plausibility logic, voting systems, filtering, and fail-safe functions may detect, reject, or limit an erroneous signal. An expert can compare the sensor input with independent measurements, controller logic, equipment response, and physical conditions to determine how the signal was processed and what effect it had on the system.
Automotive, +4
Automotive
Prepares clear, well-supported expert reports outlining methodology, analysis, findings, and opinions.
Provide Deposition Testimony
Explains findings and opinions under oath and responds to questioning during deposition testimony.
Testify in Court
Presents specialized findings and opinions clearly to judges, juries, arbitrators, or other decision-makers.
