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Cloud cost optimisation — 35% reduction without downtime

E-commerce operations, 30 staff · E-commerce

Azure bill had doubled in 12 months with no clear owner. Over-provisioned VMs, orphaned resources, and no tagging strategy — leadership wanted savings without risking production stability.

The problem

Cloud spend was growing faster than revenue. Nobody knew which workloads drove cost. Previous 'optimisation' was just turning things off until something broke.

Constraints

  • Production workloads — no downtime tolerance
  • Small internal IT team — changes must be documented
  • Need ongoing governance, not a one-off cleanup

Approach

  1. Step 1

    Cost audit

    Full Azure consumption analysis — resource inventory, sizing review, reserved instance opportunities, orphaned assets, and tagging gaps.

  2. Step 2

    Right-sizing

    Rightsized VMs based on 30-day utilisation data. Removed unused disks, IPs, and test environments. Implemented auto-shutdown for non-prod.

  3. Step 3

    Governance

    Tagging policy, monthly cost review cadence, alerts for spend anomalies, and runbook for ongoing optimisation.

Deliverables

  • Cost audit report with prioritised actions
  • Rightsizing implemented across production
  • Tagging and budget alerts configured
  • Monthly review template for internal team

Results

Cost reduction
~35% monthly Azure spend reduction
Downtime
Zero production impact during changes
Visibility
Cost per workload — tagged and reportable
Ongoing
Quarterly review retainer established

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