## 6. Platform Architecture & Features

### Platform-Related Information Categories

Based on systematic analysis of existing industrial symbiosis platforms, the system incorporates five critical platform-related information categories:

#### 1. Accessibility and Openness
- **Critical Mass**: Platform requires sufficient active users for meaningful matchmaking (network effect principle)
- **User Participation**: Active engagement rate determines platform effectiveness
- **Access Model**: Open registration vs. invitation-only for specific networks
- **Geographic Scope**: Local, regional, national, or international reach

#### 2. Sociability Features
- **Social Network Integration**: Communication channels, forums, and relationship building
- **Trust Building**: Pre-existing relationship mapping and reputation systems
- **Community Features**: Groups, blogs, event calendars for IS networking
- **Real-time Collaboration**: Chat, discussion boards, knowledge sharing

#### 3. Database Architecture
- **Background Knowledge Base**: External databases with scientific literature, case studies, LCA data
- **Consistent Taxonomy**: Standardized classification systems (EWC, NACE codes)
- **Self-Learning Capabilities**: NLP processing for continuous knowledge expansion
- **Multi-source Integration**: Scientific, regulatory, and case study data sources

#### 4. Interactive Visualization
- **Geospatial Mapping**: Interactive maps with distance calculations and transportation costs
- **Flow Visualization**: Sankey diagrams and heat maps for resource flows
- **Multi-criteria Filtering**: Dynamic filters by resource type, location, quality, cost
- **Scenario Simulation**: Drag-and-drop interface for "what-if" analyses
- **Ranking & Sorting**: User-customizable result prioritization

#### 5. Decision Support & Assessment Methods
- **Economic Evaluation**: NPV, IRR, payback period, ROI calculations
- **Environmental Impact**: LCA, CFP, material flow analysis
- **Multi-criteria Decision Analysis**: AHP, fuzzy logic for weighted evaluations
- **Risk Assessment**: Reliability analysis of proposed synergies
- **Sensitivity Analysis**: Impact of parameter variations on viability

#### 6. Real-Time Engagement & Event-Driven Features
- **Live Alerts**: "New 22 kW @ 40°C source added within 500m" (<5s delivery, 99.5% reliability)
- **Price Change Notifications**: "Waste collector raised prices 12%" (triggers 15% engagement increase)
- **Match Updates**: Real-time status changes (suggested → negotiating → contracted) (100% delivery guarantee)
- **Service Availability**: "New certified heat exchanger installer" (2km radius, <10min response)
- **Market Intelligence**: Aggregated trends ("Heat demand up 15%") (daily digest, 25% open rate target)

**Event Processing Architecture**:
- **Throughput**: 10,000+ events/second processing capacity
- **Latency**: <100ms event processing, <5s user notification delivery
- **Reliability**: 99.9% message delivery, exactly-once semantics
- **Scalability**: Auto-scale 2-20x during peak loads
- **Resource changes**: Trigger match recomputation (<30s for local updates)
- **WebSocket connections**: 1,000+ concurrent users supported
- **Background jobs**: Nightly full re-match (4-hour window, 95% accuracy improvement)

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