Equivalence Confidence Framework
A multi-dimensional methodology for determining how engineering artifacts relate — and how confidently those relationships can support enterprise decisions.
Similarity finds candidates. Equivalence establishes relationships. Confidence determines action. Experience makes that intelligence compound.
Two parts can look alike without being interchangeable. Two parts can perform the same function without looking alike.
Geometric similarity is an important starting point, but it is not enough. Determining whether two parts are genuinely equivalent — and whether that equivalence supports an engineering, manufacturing, or commercial decision — requires additional context.
ECF builds a structured confidence profile across six dimensions, asking not only how similar two parts are, but how they are equivalent and what that allows us to do. The dimensions applied depend on the decision being made and the enterprise data available.
Six dimensions of confidence
Engineering Intelligence — how equivalent are these engineering artifacts?
GC — Geometry Confidence
Have we designed something in the past that looks like this? Identifies geometric relationships independent of filenames, part numbers, or conventional metadata.
EC — Engineering Confidence
Does this require similar engineering or quality requirements? Dimensions, tolerances, materials, surface requirements, GD&T, and applicable standards.
MC — Manufacturing Confidence
Can this be manufactured the same way? Routing, process plans, tooling, machine capabilities, production history, and quality performance.
FC — Functional Confidence
Does another component perform the same engineering function? Assembly context and engineering relationships identify functional equivalence geometry alone may miss.
Decision Intelligence — given that relationship, how confidently can we act?
CC — Commercial Confidence
Can we buy, source, or cost this similarly? Supplier history, pricing, sourcing patterns, inventory, and lead times.
XC — Experience Confidence
Has the enterprise encountered and resolved a situation like this before? Prior decisions, engineering changes, trade-offs, quality outcomes, and lessons learned.
ECF is not a single workflow.
Different decisions draw on different combinations of confidence: part standardization and commonization, inventory salvage and reuse, and sourcing and should-cost intelligence.
Manufacturers already know more than their systems can tell them.
A similar part may not be equivalent. An equivalent part may not be reusable. A reusable part may not make commercial sense. ECF provides the context to know the difference.
See ECF applied to your engineering data.
Start with a representative sample of your parts and see what relationships ShapeSense can uncover.