IEC 62443
International standard for IACS cybersecurity lifecycle framework
WELL
Performance-based certification for occupant health in buildings.
Quick Verdict
IEC 62443 secures industrial control systems via risk-based cybersecurity frameworks for OT environments, while WELL certifies buildings for occupant health through performance-verified environmental and wellness strategies. OT firms adopt IEC 62443 for resilience; real estate uses WELL for productivity and ESG.
IEC 62443
IEC 62443: Industrial automation and control systems security
Key Features
- Shared-responsibility framework for stakeholders
- Zone and conduit risk-based segmentation
- Security Levels SL-T, SL-C, SL-A triad
- Seven Foundational Requirements FR1-FR7
- Modular ISASecure certification schemes
WELL
WELL Building Standard v2
Key Features
- Mandatory on-site performance verification testing
- 10 concepts from Air to Community
- Preconditions plus point-based Optimizations
- Tiered certification Bronze to Platinum
- Continuous monitoring compliance pathways
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
IEC 62443 Details
What It Is
IEC 62443 is the ISA/IEC series of standards for securing Industrial Automation and Control Systems (IACS). This consensus-based framework addresses OT cybersecurity across the lifecycle, using a risk-based approach with zones/conduits and security levels (SL 0-4).
Key Components
- Four groupings: General (-1), Policies (-2), System (-3), Components (-4).
- Seven Foundational Requirements (FR1-7) like authentication, integrity, data flow.
- SL-T (target), SL-C (capability), SL-A (achieved) metrics.
- ISASecure modular certifications (SDLA, CSA, SSA).
Why Organizations Use It
- Mitigates OT risks to safety/availability.
- Enables supplier qualification, procurement specs.
- Builds assurance chain, reduces due diligence.
- Supports regulatory baselines, insurance benefits.
Implementation Overview
- Phased: governance (2-1), risk assessment (3-2), controls (3-3/4-2).
- Applies to critical infrastructure globally.
- Involves audits, certifications for maturity.
WELL Details
What It Is
The WELL Building Standard v2, administered by the International WELL Building Institute (IWBI), is a performance-based certification framework for designing, operating, and verifying buildings that advance human health and well-being. Its scope covers indoor environmental quality, nourishment, movement, and equity, using evidence-based research translated into measurable outcomes via on-site verification.
Key Components
- **10 core conceptsAir, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind, Community (plus Innovation).
- 24 Preconditions (mandatory pass/fail) and 102 Optimizations (point-earning).
- Built on public health and building science; certification tiers (Bronze 40 points, Silver 50, Gold 60, Platinum 80) with concept minimums.
Why Organizations Use It
- Enhances occupant health, productivity, and ESG reporting.
- Builds tenant trust, higher rents, reduced absenteeism.
- Differentiates from LEED via people-first focus; voluntary but strategic for real estate, corporate wellness.
Implementation Overview
- Phased: gap analysis, scorecard, documentation, on-site testing, recertification every 3 years.
- Applies to new/existing buildings, all sizes/industries; requires third-party review and performance verification.
Key Differences
| Aspect | IEC 62443 | WELL |
|---|---|---|
| Scope | IACS/OT cybersecurity lifecycle, zones/conduits, security levels | Building occupant health/well-being, air/water/light/comfort/mind |
| Industry | Industrial sectors (energy, manufacturing, utilities), global | All buildings (office, residential, commercial), global |
| Nature | Voluntary consensus standards/certification series | Voluntary performance-based building certification |
| Testing | ISASecure modular certifications, component/system audits | On-site performance verification, air/water/light testing |
| Penalties | Loss of certification, supply chain exclusion | No certification, recertification failure |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about IEC 62443 and WELL
IEC 62443 FAQ
WELL FAQ
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