VR Training Framework: 85% Faster Deployment

Siemens Energy | 2023-Present

Project Overview

Built a data-driven VR training framework enabling non-technical trainers to create industrial training modules independently, reducing deployment time from 2 months to 10 days.

Impact: 85% faster deployment, eliminated developer bottlenecks, and enabled solo development across 3-4 major department projects.

The Challenge

Siemens Energy needed to rapidly deploy VR training modules for industrial equipment, but the traditional development process was creating massive bottlenecks.

Technical Constraints:

• Meta Quest 3 baseline (standalone VR, no PC tethering).
• 90 FPS requirement for 8-hour industrial shifts to prevent motion sickness.
• Offline-first: Factory environments have restricted/unreliable networks.
• Multi-platform support: HoloLens 2, Quest 2/3, and future XR devices.

The Solution: Data-Driven No-Code Framework

Architected a JSON-driven VR training system with a custom visual editor, enabling trainers to create complex scenarios through a drag-and-drop interface without writing a single line of code.

Core Innovation: Parallel Action Engine

Traditional VR training uses linear steps. Our approach treats each step as a container of parallel actions:

{
  "actions": [
    {"type": "highlight", "targetId": "wrench", "blocking": false},
    {"type": "play_audio", "audioId": "instruction", "blocking": false},
    {"type": "wait_for_grab", "targetId": "wrench", "blocking": true}
  ]
}

Result: Multiple visual cues run simultaneously; non-blocking actions (audio/hints) run in the background; the container advances only when ALL blocking actions are complete.

Architecture Decisions

Decision #1: Hexagonal Architecture (Pure C# Domain Layer)

• ✅ Architecture designed for testability: Runs headless in NUnit in seconds.
• ✅ Engine-agnostic: Portable to Unreal, WebXR, or future engines.
• ❌ Trade-off: More files required (Interface + Implementation for each action).

Decision #2: Offline-First Two-Scene Architecture

Scene-1 (Online Gateway): Downloads content via cloud storage, verifies SHA-256 hashes, and preloads assets.
Scene-2 (Offline Runtime): 100% offline execution; zero network failures; zero JSON parsing during active runtime.

• ✅ Zero training interruptions due to network issues on the factory floor.
• ✅ 100% offline compliance: Passed strict Siemens security audits.

Decision #3: Event-Driven Zero-Allocation Execution

public class ActionContainer {
    private int _blockingCount;
    private int _completedCount;
    public event Action OnAllBlockingComplete; // O(1), zero allocation
    
    public void NotifyComplete() {
        _completedCount++;
        if (_completedCount == _blockingCount) {
            OnAllBlockingComplete?.Invoke();
        }
    }
}

• ✅ 90 FPS sustained on Meta Quest 3.
• ✅ Memory Efficiency: Reduced GC pressure through strict zero-allocation patterns.

Phase 2: AI-Powered Analytics Dashboard (In Progress)

Extending framework with server-side intelligence for training program optimization.

Technical Implementation Highlights

// Domain Layer (Pure C#, Zero Unity Dependencies)
public class HighlightBehavior : IActionModule {
    private readonly IVisualTarget _target;
    private float _elapsedMs;
    
    public void Execute() {
        _target.SetHighlight(_data.colorHex);
        _elapsedMs = 0;
    }
}

// Unity Adapter Layer (Engine Bindings)
public class UnityVisualTarget : IVisualTarget {
    public void SetHighlight(string colorHex) {
        // Implementation using Renderer and Material APIs
        _renderer.material.SetColor("_EmissionColor", parsedColor);
    }
}

The Results

Tech Stack

Unity 2022 LTS | C# .NET Standard 2.1 | Meta Quest 3 | Azure Cloud Services | NUnit | Hexagonal Architecture | Event-Driven Design

Key Learnings

• Architecture Investment: Initial discipline cost paid off through significantly faster iterations and fewer production bugs.
• Testability = Confidence: Decoupling logic allowed for rapid deployments and fearless refactoring of core systems.
• DDD Portability: Domain logic proved reusable across platforms; a WebGL prototype was built in just 3 days using the same core logic.
• Offline-First: Designing for the "worst-case" network is mandatory for factory floor success.

← Back to Home