Review the evidence signals before interviewing. Then use the anchored descriptions—not instinct alone—to choose the score that best matches each answer.
01
Evaluation factor
Portfolio
35% weight
Check for shipped digital twin interfaces: 3D asset viewers, BIM or plant overlays, live telemetry dashboards. Ask which twins went into operator hands and at what fidelity.
Evidence to listen for
Work exists and can be looked at, not just described
States what they made versus what the team or a template made
Shows range rather than one repeated style
Can walk through a piece from brief to final
Five-point scoring guide
1
Poor
No portfolio, or work that is unattributable or clearly templated.
2
Needs Improvement
Thin portfolio; unclear what they personally made.
3
Satisfactory
Real work with adequate range; contribution mostly clear.
4
Very Good
Strong varied portfolio with clear personal ownership.
5
Excellent
Shows two or three live twin experiences with named clients, screen recordings of real sensor data, and their specific ownership of each flow.
02
Evaluation factor
Craft and rationale
25% weight
Probe craft in spatial UI: camera controls, level-of-detail decisions, Unity or Unreal or Cesium prototyping, colour coding of alarm states against ISA-101 style conventions.
Evidence to listen for
Explains why a layout, type choice, or colour decision serves the brief
Knows typography and hierarchy as craft, not decoration
Works to a brand system without either breaking it or hiding behind it
Names the tools they are genuinely fast in
Five-point scoring guide
1
Poor
Cannot explain any decision; work is arbitrary.
2
Needs Improvement
Talks in taste terms only; no link between choice and brief.
3
Satisfactory
Sound craft with some ability to justify decisions.
4
Very Good
Articulate about why each choice serves the brief.
5
Excellent
Explains why a plan view beat a 3D orbit for a given task, and defends occlusion, labelling, and alarm hierarchy choices concretely.
03
Evaluation factor
Feedback and iteration
25% weight
Assess how operator and engineer feedback reshaped the twin: usability sessions in control rooms, misread status indicators, navigation confusion found during commissioning.
Evidence to listen for
Takes critique without treating it as an attack
Distinguishes a subjective preference from a real problem, and says so politely
Iterates fast rather than defending version one
Delivers files correctly and on time
Five-point scoring guide
1
Poor
Defensive about critique; will not revise.
2
Needs Improvement
Accepts feedback passively; iterations do not improve the work.
3
Satisfactory
Revises willingly; struggles to push back on weak feedback.
4
Very Good
Iterates quickly and can argue for the work when the feedback is wrong.
5
Excellent
Cites a specific misinterpretation caught in testing, the redesign that fixed it, and the measured drop in task time or error rate.
04
Evaluation factor
Working with the brief
15% weight
Test how they scope with data and simulation constraints: available IoT tag lists, refresh latency, mesh sizes, offline plant conditions, and what stakeholders actually asked for.
Evidence to listen for
Asks about audience and goal before opening the design tool
Works with marketing, product, or clients rather than in isolation
Flags an impossible brief early
Hands over files and assets others can actually use
Five-point scoring guide
1
Poor
Designs in isolation; ignores the brief's purpose.
2
Needs Improvement
Starts designing before understanding the goal.
3
Satisfactory
Asks the right questions when prompted.
4
Very Good
Interrogates the brief up front and hands over cleanly.
5
Excellent
Interrogates the tag schema and latency budget before sketching, and negotiates scope with engineering rather than designing unbuildable fidelity.
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