Site Reliability Engineering (SRE)
Modern App Development

Shift To Site Reliability Engineering (SRE) – Modern App Development Model


The IT industry is fast-paced and robust development practices are adopted to keep up with the ever-changing industry trends. The mobile and desktop apps are piling up with each passing day. As a result, various models have been introduced to accelerate the development phase. Process automation is vital for speeding up app development. Site Reliability Engineering (SRE) has emerged as an effective and efficient model responding exactly to this need.

In this article, we briefly touch upon what SRE is, its pros and cons, and other related details.

What Is SRE?

SRE is an abbreviation for Site Reliability Engineering. It is a software engineering process that is responsible for the automation of various IT operations. The SRE model automates development processes such as change management, system management during production, emergency response, incident response, etc. 

Use the code for the automation of functions when we perform them manually. The software code is more scalable and sustainable than manual processes. SRE model also enables the developers to release updates and new versions continuously.

What Do Site Reliability Engineers Do?

Site reliability engineers are software developers having vast experience in managing IT operations. Most of the time SRE’s perform tasks such as log analysis, tuning performance, patch application, testing production environments, incident response, etc. Their job description also includes automating these operations and save time and money. 

The SRE team works in coordination between the operations and development team. They coordinate with both teams to discuss the new features and functionalities of the software. They are also responsible for planning the automation of functions that can speed up feature development. The SREs also handle risks and errors that can occur during development.

The prior experience of the site reliability engineers helps them complete the following operations during development:

    • Service Level Indicators (SLIs): It measures the level of service by systems. It measures metrics such as availability, latency, or uptime.
    • Service Level Objectives (SLOs): These objectives define the agreed means of measuring indicators associated with service levels.
    • Error budget: The error budget is determined by measuring the maximum duration a system can fail. It is measured without violating the terms and conditions set by SLA. The SRE team uses the error budget tool to measure the organization’s pace of innovating its services.

Working Of Error Budgets In SRE

An error budget is a tool for measuring error duration. Let’s suppose that a company promises an uptime of 99.99% which equals a downtime of 4 minutes 23 seconds each month. Before the development team rolls out any new change, they make sure that the uptime doesn’t cross an acceptable level.

The error budget tools help the operations and development team in the following manner:

  • It improves the performance and reliability of the services.
  • It helps in making data-driven decisions about the deployment of new functionalities and modules.
  • Encourage innovation by risk-taking at acceptable limits.

Site Reliability Engineering Benefits

The benefits of using the SRE model are as following:

  • It helps in gaining knowledge of service health. Analyze the logs, metrics, traces of all the services running in the organization to gain complete insight.
  • The SRE model also helps in calculating the downtime cost. It also gives insights into the costs of violating SLA and calculates the impact of system reliability on different departments.
  • It builds up on-call processes and alert workflows for the optimization of incident response.
  • SRE builds a modern network operations center by sending alerts.


The Site Reliability Engineering practices and processes are extremely significant in modern application development. It calculates the risks and possible errors efficiently for the development of a high-performing and budget-friendly product. Check out the following links from Google for more information on SRE’s foundations & principles and associated practices & processes.

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