# System Design: Principles for Maintainability, Scalability, and Reliability

DevFeed: [System Design: Principles for Maintainability, Scalability, and Reliability](<https://devfeed.tech/articles/system-design-principles-for-maintainability-scalability-and-reliability-39554.md>)

Original publisher: [Read original article](<https://ankit-rana.com/logs/02-system-design-principles/>)

Author: hello@ankit-rana.com

Published: 2026-03-16T00:00:00Z

Content type: tutorial

Language: en

Sources: [Ankit Rana | Mechanical Sympathy](<https://devfeed.tech/sources/ankit-rana-mechanical-sympathy.md>)

Topics: [Maintainability](<https://devfeed.tech/topics/maintainability.md>), [reliability](<https://devfeed.tech/topics/reliability.md>), [Scalability](<https://devfeed.tech/topics/scalability.md>), [Architecture & Design](<https://devfeed.tech/topics/architecture-design.md>), [data](<https://devfeed.tech/topics/data.md>), [Testing](<https://devfeed.tech/topics/testing.md>), [observability](<https://devfeed.tech/topics/observability.md>), [CRUD](<https://devfeed.tech/topics/crud.md>), [Latency](<https://devfeed.tech/topics/latency.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [crud](<https://devfeed.tech/tags/crud.md>), [data-systems](<https://devfeed.tech/tags/data-systems.md>), [debug](<https://devfeed.tech/tags/debug.md>), [latency](<https://devfeed.tech/tags/latency.md>), [maintainability](<https://devfeed.tech/tags/maintainability.md>), [observability](<https://devfeed.tech/tags/observability.md>), [reliability](<https://devfeed.tech/tags/reliability.md>), [scalability](<https://devfeed.tech/tags/scalability.md>), [system-design](<https://devfeed.tech/tags/system-design.md>)

## AI overview

This article presents production system design around reliability, scalability, and maintainability. It discusses data building blocks beyond CRUD, fault containment, isolation, testing, recovery, observability, latency versus response time, and vertical versus horizontal scaling.

## Source excerpt

Reliability, scalability, and maintainability rest on one distinction: a fault is a component-level anomaly, a failure is the system no longer delivering its service. Design to contain faults so they never become failures, and stay precise that latency is waiting time while response time is the full client-visible number.