Domains

PRISM (Platform for Reliability, Improvement, and Strategic Maturity) is an extensible framework that organizes metrics into domains. The core framework provides base domain support, with domain-specific content available through extension modules.

Core Domains

Domain	Constant	Description
Operations	operations	Reliability, performance, and efficiency metrics
Security	security	Security metrics
Quality	quality	Code quality, testing, and defect management metrics

Operations Domain

The operations domain covers metrics related to reliability, performance, and efficiency. This is the primary domain included in prism core.

Common Metric Categories

Category	Example Metrics
Reliability	Availability, durability, error rate
Efficiency	Deployment frequency, lead time, resource utilization
Quality	Change failure rate, code coverage
Response	Mean time to recovery, incident response

DORA Alignment

Operations metrics often align with DORA (DevOps Research and Assessment) metrics:

DORA Metric	PRISM Stage	Category
Deployment Frequency	Build	Efficiency
Lead Time for Changes	Build	Efficiency
Mean Time to Recovery	Response	Response
Change Failure Rate	Runtime	Quality

Example Metrics

[
  {
    "id": "ops-availability",
    "name": "Service Availability",
    "domain": "operations",
    "stage": "runtime",
    "category": "reliability",
    "metricType": "rate",
    "unit": "%",
    "current": 99.95,
    "target": 99.99
  },
  {
    "id": "ops-deploy-frequency",
    "name": "Deployment Frequency",
    "domain": "operations",
    "stage": "build",
    "category": "efficiency",
    "metricType": "count",
    "unit": "/day",
    "current": 5,
    "target": 10
  },
  {
    "id": "ops-mttr",
    "name": "Mean Time to Recovery",
    "domain": "operations",
    "stage": "response",
    "category": "response",
    "metricType": "latency",
    "unit": "hours",
    "current": 2,
    "target": 1
  }
]

Security Domain

The security domain covers application security, infrastructure security, and compliance metrics.

Quality Domain

The quality domain covers code quality, testing effectiveness, and defect management. Quality Engineering (QE) teams typically own standards in this domain.

See Quality Domain for detailed documentation including ISO 25010 quality verticals.

Domain Extensibility

PRISM is designed to be extensible. Domain modules can provide:

• Metrics - Domain-specific metric definitions
• Goals - Strategic objectives with maturity models
• Dashboards - Visualization configurations
• Framework Mappings - Industry framework alignment

Using Domain Modules

# Create operations-focused document
prism init -d operations -o ops.json

# Create security-focused document
prism init -d security -o security.json

Domain Weights

In PRISM score calculation, domains have configurable weights:

Domain	Default Weight
Operations	40%
Security	40%
Quality	20%

Weights can be customized in the ScoreConfig:

config := &prism.ScoreConfig{
    DomainWeights: map[string]float64{
        "operations": 0.5, // 50% weight
        "security":   0.3, // 30% weight
        "quality":    0.2, // 20% weight
    },
}

Best Practices

1. Start with Operations - Use ops metrics as a foundation
2. Add Domain Modules - Extend with security or other domain modules as needed
3. Cover All Stages - Each domain should have metrics across the lifecycle
4. Align with Frameworks - Map metrics to industry frameworks (DORA, SRE, NIST)
5. Set Appropriate Weights - Adjust domain weights based on organizational priorities