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// IEC 62443, APPLIEDTurn requirements into buildable OT decisions.

A requirement is not a design decision.

You have a requirement and a system, planned or running. Three questions find where they disagree, and what you would need to know to settle it.

  1. 01THREE DECISIONS
  2. 02A MODEL THAT CHANGES WITH EACH ANSWER
  3. 03IEC DECISION NOTE TO KEEP · NO EMAIL NEEDED

You will not be asked for site names, network details or vulnerabilities. Your choices stay in this browser.

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// WHAT THIS CHECK ASKS

  1. What are you trying to decide?

    • Zones and conduits
    • Requirement allocation
    • Brownfield change
    • Assurance evidence
    • Not sure

  2. Where are you in the lifecycle?

    • Concept
    • Design
    • Existing plant
    • Assurance or review
    • Not sure

  3. What is stopping the decision?

    • Interpretation
    • Operational impact
    • Evidence
    • Ownership
    • Not sure

A structured way of thinking about the decision. It is not an IEC 62443 conformity assessment, certification or formal assurance.