What Is an AWS Well-Architected Review?

An AWS Well-Architected Review (WAR) is a structured evaluation of your cloud workloads against AWS's six foundational pillars of architecture excellence. Conducted using the AWS Well-Architected Framework, it identifies risks, inefficiencies, and misconfigurations in your environment — and produces a prioritized action plan to fix them. For organizations running production workloads on AWS, it's one of the highest-ROI exercises you can invest in.

The 6 Pillars of the AWS Well-Architected Framework

AWS originally defined five pillars; a sixth — Sustainability — was added in 2021. Each pillar evaluates a different dimension of your architecture:

1. Operational Excellence

How well do you run and monitor systems to deliver business value? This pillar examines your runbooks, deployment processes, incident response, and observability practices. Organizations that score well here have automated deployments, centralized logging (think CloudWatch, Datadog, or Splunk), and documented operational procedures.

2. Security

Are you protecting data, systems, and assets appropriately? The review evaluates IAM policies, encryption at rest and in transit, network segmentation via VPCs, security group configurations, and compliance posture. Common findings include overly permissive IAM roles, unencrypted S3 buckets, and missing CloudTrail logging.

3. Reliability

Can your workload recover from failures and meet demand? This covers multi-AZ deployments, auto-scaling configurations, backup and disaster recovery strategies, and fault tolerance. The review checks whether your RTO and RPO targets are actually achievable with your current architecture.

4. Performance Efficiency

Are you using compute resources efficiently? This pillar examines instance type selection, database configurations, caching strategies (ElastiCache, CloudFront), and whether you're leveraging the right AWS services for your workload patterns — such as using Lambda for bursty workloads or Graviton instances for cost-efficient compute.

5. Cost Optimization

Are you avoiding unnecessary spend? The review identifies idle resources, oversized instances, missing Reserved Instance or Savings Plan coverage, and opportunities for storage tiering. Most organizations find 20-30% potential savings after their first review.

6. Sustainability

Are you minimizing environmental impact? This newer pillar evaluates resource utilization rates, data transfer efficiency, and whether you're selecting the most energy-efficient instance types and regions for your workloads.

Who Needs a Well-Architected Review?

A WAR is valuable at several stages:

• Post-migration: You've moved to AWS, but the architecture was "good enough" to get there. Now it's time to optimize.
• Before scaling: If you're about to grow significantly, a review ensures your architecture can handle it.
• After an incident: A major outage or security event is a clear signal to reassess.
• Annual checkup: AWS best practices evolve. What was optimal 18 months ago may not be today.
• Compliance requirements: Frameworks like SOC 2, HIPAA, and FedRAMP align closely with Well-Architected findings.

What to Expect During the Process

A typical review takes 2-4 weeks and follows this structure:

1. Scoping: Identify which workloads to review (you don't have to review everything at once).
2. Discovery: Your AWS partner examines your architecture, talks to your engineering team, and reviews configurations.
3. Assessment: Each pillar is evaluated using the AWS Well-Architected Tool, generating high-risk and medium-risk findings.
4. Remediation plan: Findings are prioritized by business impact and effort, producing an actionable roadmap.
5. Remediation support: The best partners don't just hand you a report — they help you implement the fixes.

How to Prepare for Your Review

Before your review, gather the following: architecture diagrams (even informal ones), a list of AWS accounts and their purposes, your current monitoring and alerting setup, recent incident reports, and your compliance requirements. The more context your review partner has, the more actionable the findings will be.

Get Your Architecture Reviewed

As an AWS Advanced Consulting Partner, EFS Networks conducts Well-Architected Reviews that go beyond checkbox compliance. We identify real risks and deliver remediation plans you can actually execute. Learn more about our AWS and cloud services, or contact us to schedule a review.