Toyota Production System Principles

Duende is designed around Toyota Production System (TPS) principles.

Jidoka (自働化) - Autonomation

Stop on error, don't propagate defects.

In duende:

• Daemons stop cleanly on fatal errors
• Health checks detect problems early
• Restart policies handle recovery

Poka-Yoke (ポカヨケ) - Error Prevention

Design systems to prevent errors.

In duende:

• Configuration validation at load time
• Type-safe APIs prevent misuse
• Feature gates prevent platform mismatches

Heijunka (平準化) - Load Leveling

Smooth out workload variations.

In duende:

• Resource limits prevent overload
• Backoff policies for restarts
• Queue management in daemon loops

Muda (無駄) - Waste Elimination

Eliminate unnecessary resource usage.

In duende:

• Circuit breakers prevent wasted retries
• Memory limits prevent runaway allocation
• Efficient signal handling

Kaizen (改善) - Continuous Improvement

Measure, analyze, improve.

In duende:

• RED metrics collection
• Health check scoring
• Observability integration

Genchi Genbutsu (現地現物) - Go and See

Direct observation of reality.

In duende:

• renacer syscall tracing
• Process state monitoring
• Real-time metrics