1. Purpose

The Requisite Variety Checker tests whether a controller has enough variety, slack, humility, and selection breadth to regulate its environment coherently.

2. Core Question

Can this controller regulate this environment without suppression or hidden debt?

3. Construct Class

Type: Diagnostic Evaluator

Source status: Canon-Ready

Primary module: Cybernetics

Related modules: Scaling, Security, AI, Governance

4. Inputs

• environmental variety
• controller variety
• slack
• humility
• selection span
• load
• gain
• restoration capacity
• timing delay

5. Outputs

• sufficient variety
• insufficient variety
• suppression risk
• required slack increase
• required selection expansion
• required load reduction

6. Failure Modes Detected

Not specified in the registry index.

7. Restoration Links

Not specified in the registry index.

8. Tool Readiness

Evaluator Ready

9. Tool Potential

This can become a control-feasibility checker for AI systems, organi

10. Source Notes

This compact spec sheet was generated from the Constructs Registry index. It preserves the current source fields and should be expanded against the full construct template during editorial review.

11. Machine-Readable Summary

construct_id: "CONSTRUCT-012"
title: "Requisite Variety Checker"
abbreviation: ""
construct_class: "Diagnostic Evaluator"
tool_readiness: "Evaluator Ready"
primary_module: "Cybernetics"
source_status: "Canon-Ready"
registry_source: "content/archive/constructs/registry/index.md"