PII

PII, or Personally Identifiable Information, commonly refers to any information that can be used to identify a specific individual, either directly or in combination with other data. In industrial and regulated manufacturing environments, PII most often appears in HR systems, training records, access control logs, supplier contact data, and engineering or quality workflows that reference specific people.

What PII typically includes

PII generally includes, but is not limited to:

• Direct identifiers such as full name, government-issued identification numbers, employee IDs, email addresses, phone numbers, and physical addresses
• Authentication or account information tied to a person, such as usernames when linked to an identifiable individual
• Personnel-related records, including performance reviews, shift schedules, time and attendance data, and training records when associated with a named person
• Any other data elements that, alone or combined, can reasonably identify a specific person

In manufacturing IT/OT and MES/ERP contexts, PII may be stored or processed in systems such as HR platforms, badge access systems, incident logs, maintenance management tools, and plant-level applications that track operator actions or approvals.

What PII usually excludes

Information is typically not considered PII when it:

• Has been de-identified or anonymized so that individuals cannot reasonably be re-identified
• Is purely technical or equipment data with no link to a specific person (for example, machine cycle times or generic work order numbers)
• Relates to business entities (such as company names or facility identifiers) without reference to a natural person

Operational meaning in regulated environments

In regulated manufacturing environments, PII handling is typically addressed through privacy and security policies, access controls, and data governance. Key operational considerations include:

• Identifying which systems and data flows contain PII, such as HR integrations with MES, training records linked to operator qualifications, or supplier contact data in ERP
• Limiting PII collection and retention to what is necessary for workforce management, safety, compliance, and operational use
• Controlling who can view or modify PII within quality, maintenance, and engineering workflows
• Logging and monitoring access to PII where required by internal policies or applicable privacy regulations

Relationship to NIST SP 800-53 PT controls

In the context of NIST SP 800-53, the PT (Personally Identifiable Information Processing and Transparency) control family is focused on how organizations process, protect, and provide transparency about PII. For industrial operations this typically means:

• Understanding when manufacturing, HR, supplier, or engineering systems handle PII
• Defining how PII is collected, used, shared, and minimized across IT and OT systems
• Documenting notices and internal procedures related to PII while aligning with broader security controls

Common confusion

PII is sometimes confused with:

• PHI (Protected Health Information): PHI is a specific category of health-related information associated with an individual in certain regulated contexts. PII is broader and not limited to health data.
• Personal data (privacy regulations): Many privacy laws refer to “personal data” or similar terms. These concepts overlap heavily with PII but may be defined differently in specific legal frameworks.

In manufacturing settings, another source of confusion is technical log data that contains user IDs or operator names. When such data can be linked to an identified or identifiable person, it is generally treated as PII for governance and control purposes.