Understanding Modern IT Methodologies: A Comprehensive Comparison

November 4, 2023 Development Process, DevOps, DevSecOps, Engineering Practices, Methodology, Software Engineering No comments

In the rapidly evolving landscape of software development and IT operations, several methodologies have emerged to streamline processes, enhance collaboration, and address specific challenges. In this article, we will explore and compare four prominent methodologies: DevOps, DevSecOps, SRE (Site Reliability Engineering), and Platform Engineering.

1. Introduction

In the realm of IT, methodologies play a crucial role in shaping the way teams collaborate and deliver software. Let’s delve into the intricacies of four widely adopted methodologies.

2. DevOps

Definition: DevOps is a set of practices that combine software development (Dev) and IT operations (Ops), aiming to shorten the development lifecycle and deliver high-quality software continuously.

Key Components:

  • Continuous Integration
  • Continuous Delivery
  • Collaboration
  • Automation

Popular Tools:

  • Jenkins
  • Docker
  • Azure DevOps
  • Ansible
  • Circle CI
  • Github Actions
  • GitLab


  • Faster time to market
  • Improved collaboration between teams
  • Continuous delivery and integration

3. DevSecOps

Definition: DevSecOps is an extension of DevOps that integrates security practices into the development and operations processes, ensuring a holistic approach to software security.

Key Security Practices:

  • Continuous Security Testing
  • Vulnerability Management
  • Security as Code


  • SonarQube
  • HashiCorp Vault
  • Tfsec
  • Checkov


  • Enhanced security posture
  • Faster identification and remediation of vulnerabilities
  • Integration of security into the development lifecycle

4. SRE (Site Reliability Engineering)

Introduction: SRE is a discipline that incorporates aspects of software engineering and applies them to infrastructure and operations problems, with a focus on creating scalable and highly reliable software systems.

Core Principles:

  • Reliability Engineering
  • Error Budgets
  • Automation


  • Prometheus
  • Grafana
  • Terraform


  • Increased system reliability
  • Efficient use of resources
  • Balancing reliability and feature development

5. Platform Engineering

Definition and Scope: Platform Engineering involves designing, building, and maintaining the underlying infrastructure and tools to support the development and deployment of applications.


  • Infrastructure as Code
  • Automation
  • Continuous Improvement

Tools and Technologies:

  • Kubernetes
  • Terraform
  • Helm


  • Consistent and scalable infrastructure
  • Automation of infrastructure management
  • Efficient resource utilization

6. Tabular Comparison:

AspectDevOpsDevSecOpsSREPlatform Engineering
Primary FocusCollaborationIntegrating SecurityReliability & StabilityPlatform Infrastructure
Key PracticesContinuous DeliveryContinuous SecurityError BudgetsInfrastructure as Code
Core PrinciplesCollaborationSecurity as a CultureReliabilityAutomation and Efficiency
ToolingJenkins, Docker, Azure DevOps, etc.OWASP, SonarQube, etc.Prometheus, GrafanaKubernetes, Terraform
Security IntegrationPart of the pipelineThroughout the pipelinePart of the reliability goalsPart of Infrastructure Design
ResponsibilitiesDevs and Ops togetherShared responsibilityFocus on reliabilityInfrastructure Management
MetricsDeployment Frequency, Lead TimeMean Time to Remediate, Vulnerability DensityError Rate, AvailabilityResource Utilization, Uptime
BenefitsFaster Releases, CollaborationEnhanced Security, Faster RemediationImproved Reliability, AutomationScalability, Consistency

7. Comprehensive Benefits:

In summary, each methodology offers unique benefits that cater to specific needs in the software development and IT operations landscape. Whether your focus is on collaboration, security, reliability, or infrastructure management, choosing the right methodology depends on your organizational goals and priorities.

8. Conclusion

As we navigate the complexities of modern IT, understanding these methodologies can empower teams to make informed decisions. The evolution of DevOps into DevSecOps, the emergence of SRE, and the rise of Platform Engineering showcase the industry’s commitment to addressing challenges and continuously improving software delivery practices.

In conclusion, the choice between DevOps, DevSecOps, SRE, or Platform Engineering depends on factors like organizational structure, goals, and the specific needs of your projects. Embracing the principles and practices of these methodologies can lead to more efficient, secure, and reliable software development and operations.

Certified–Professional Scrum Master-I(PSM-I)

August 14, 2013 Agile, Announcements, Certification, Development Process, KnowledgeBase, Methodology, Scrum No comments

Before I joined UnitedHealth Group as a Consultant in Jul 2010, I didn’t even hear about of Agile or Scrum.I have been working in an Agile environment for last 3 years and it was really interesting experience to develop high value applications and products using Scrum. I worked on few projects during the tenure as a Agile Development Team member and acted as Scrum Master in building some high quality mobile applications. As a team we enjoyed working together in Agile Environment.  Now I am confident enough to say that I know bits and pieces of scrum. Frankly speaking I love to preach about Scrum. 

What is Scrum? :  for those who does not know about Scrum

Scrum is an iterative and incremental agile software development framework for managing software projects and product or application development. Its focus is on “a flexible, holistic product development strategy where a development team works as a unit to reach a common goal” as opposed to a “traditional, sequential approach”.

Scrum enables the creation of self-organizing teams by encouraging co-location of all team members, and verbal communication between all team members and disciplines in the project.

A key principle of Scrum is its recognition that during a project the customers can change their minds about what they want and need (often called requirements churn), and that unpredicted challenges cannot be easily addressed in a traditional predictive or planned manner.

As such, Scrum adopts an empirical approach—accepting that the problem cannot be fully understood or defined, focusing instead on maximizing the team’s ability to deliver quickly and respond to emerging requirements.

Why is it called ‘Scrum’?

In rugby football, a scrum refers to the manner of restarting the game after a minor infraction. In the early 1990s, Ken Schwaber used what would become Scrum at his company, Advanced Development Methods, and Jeff Sutherland, with John Scumniotales and Jeff McKenna, developed a similar approach at Easel Corporation, and were the first to refer to it using the single word Scrum.

[Ref: Wikipedia]

If you are interested to know more about Scrum visit the wikipedia page:

There is two professional certifying authorities for obtaining a Certification in Agile Scrum.

1. –> provides the Certified Scrum Master(CSM) certification.

  • Any one who attend a training/course(Certified Scrum Master course) by a Certified  Scrum Trainer(CST), will be able to get this certification.
  • Course Training Cost  is little costly comparing to PSM-1.
  • Assessment is just for the sake, you will get Certificate even through you didn’t do well in the assessment.
  • The certification has a validity of 2 years, and you will have to renew every 2 years($150).

2. –> by Scrum’s co-creators (Ken Schwaber & Jeff Sutherland)  – provides Professional Scrum Master(PSM) 1 and 2 certifications.

  • This certification is based on real Assessment of your Scrum knowledge.
  • You will have to score 85% out of 100 to get this certification.
  • This certification will not expire.
  • PSM-1 costs 100$

Both certifications has it’s own value in the market, since is relatively new comparing to ScrumAlliance, you will see more organization focusing towards CSM. But trend has changed and either CSM or PSM would be good enough to prove your proficiency in Scrum Development and to work in a Scrum Development Team.

Even though have completed the PSM training in Jan 2013, it took a while for me to write the exam, due to priority activities at the workplace.  But  I just cleared’s – Professional Scrum Master-1(PSM-1) certification.  Glad that I cleared it and now I am among those 11k – PSM-I certified developers.


[PSM -I – Badge]

To know more about Scrum and Certifications visit the following links:

CSM  – 

PSM-I  –


The Scrum Guide in one location: