Local development priorities favor speed and visibility. Production priorities favor restriction and defense-in-depth. Network Level Security

These refer to the physical limits and requirements of the machinery.

Development servers run on single threads to simplify debugging. Production environments require concurrent architectures.

Maintain two identical production environments ("Blue" and "Green"). Blue runs live traffic; Green receives the new code update. Once Green passes health checks, the load balancer instantly switches traffic to Green. If an issue occurs, it rolls back to Blue instantly.

For example, to rename a column: first add the new column, write data to both columns simultaneously, migrate the old data, update the application code to read from the new column, and finally drop the old column in a subsequent release. Conclusion

. Its primary objective is to provide data that managers can use to optimize workflows, identify waste, and ensure production targets are being met. 1. Key Components of a Production Report

Modern production settings strictly adhere to the Twelve-Factor App principles, specifically regarding configuration. Code and configuration must be completely decoupled.