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Cloud Migration Gantt Chart Template

Assessment → Landing Zone → Pilot → Wave Migration → Decommission

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What's included

This template comes pre-configured with 3 groups and 17 tasks — ready to customize.

Assessment & Design

6 tasks

Application Portfolio Assessment

Cost Modeling (TCO Analysis)

Target Architecture Design

Security Baseline Config

IAM Policy Design

Landing Zone & Networking

Migration Waves

7 tasks

CI/CD Pipeline Migration

Pilot (2-3 non-critical apps)

Wave 1 — Dev & Staging

Database Migration Strategy

Wave 2 — Production Workloads

Team Training

Wave 3 — Legacy & Database

Cutover & Optimize

4 tasks

Monitoring & Alerting Setup

Disaster Recovery Testing

On-Prem Decommission

Cost Optimization & FinOps

Why this matters

A cloud migration is not a technology project — it is a business transformation that happens to involve technology. The decision to lift-and-shift versus re-architect determines your timeline, cost, and long-term operational model. Most organizations underestimate the 'last mile' of migration: the legacy applications, the database with 15 years of stored procedures, and the compliance requirements that do not map cleanly to cloud-native services.

When to choose this template

Use this template when migrating on-premises infrastructure to AWS, Azure, or GCP. It covers application portfolio assessment, landing zone setup, pilot migration, wave-based migration execution, and post-migration optimization. Adjust the wave count and timeline based on your application portfolio size.

Key considerations

Things to plan for before you start.

1The lift-and-shift vs. re-architect decision should be made per application, not as a blanket strategy. Lift-and-shift is faster but often more expensive to operate. Re-architecting takes longer but captures cloud-native benefits.
2Hidden costs are everywhere: data egress fees, inter-AZ traffic, reserved instance commitments, and the operational cost of managing cloud infrastructure with an on-prem-trained team. Budget for 20-30% above the cloud provider's estimate.
3The pilot wave is where 80% of your learnings happen. Choose 2-3 non-critical applications, migrate them fully, and run them for 2-4 weeks before starting production waves. The pilot reveals networking issues, permission problems, and performance gaps.
4Compliance certification timing is critical. If you need SOC 2, HIPAA, or PCI compliance in the cloud, start the audit process during the pilot wave. Auditors need to see production workloads running in the cloud, not just a plan.
5Rollback planning is non-negotiable for production workloads. For each wave, document: how to fail back to on-prem, how long failback takes, and what data synchronization is needed during the cutover window.
6Network architecture (VPN, Direct Connect/ExpressRoute, DNS, firewall rules) is always on the critical path. Start networking work in parallel with the first wave, not sequentially.

Pro tips from experienced PMs

Hard-won advice to help you avoid expensive mistakes.

Build a 'migration factory' — a repeatable process with templates, scripts, and checklists for each application type (web app, database, file share, etc.). This accelerates waves 2-3 dramatically compared to treating each migration as unique.

Measure application performance baselines before migration. You need to prove that cloud performance is equal to or better than on-prem. Without baselines, every post-migration performance complaint becomes an unsolvable debate.

Use the cloud provider's free migration assessment tools (AWS Migration Hub, Azure Migrate). They automate application discovery and dependency mapping, saving weeks of manual work.

Negotiate committed-use discounts (Reserved Instances, Savings Plans) for Wave 2 production workloads. You will know your resource requirements from the pilot wave, and committed pricing is 30-50% cheaper than on-demand.

Decommission on-prem infrastructure aggressively after migration. Every month you run both environments doubles your infrastructure cost. Set a hard decommission date and stick to it.

Common pitfalls to avoid

Mistakes that derail projects of this type.

Migrating everything at once. A 'big bang' cloud migration is high-risk and operationally chaotic. Wave-based migration with clear cutover windows is always safer for production workloads.

Ignoring the people side of migration. Your infrastructure team needs cloud training before, not after, the migration. Budget for certification training (AWS Solutions Architect, Azure Administrator) and hands-on labs.

Treating cloud migration as a cost reduction project. In the short term (12-18 months), cloud is often more expensive than on-prem due to learning curves, over-provisioning, and dual-running costs. Long-term savings come from elasticity and managed services.

Not implementing FinOps from Day 1. Without cost monitoring, tagging, and budget alerts, cloud spend spirals out of control within 3 months. Assign a FinOps owner before the first workload moves.

Template at a glance

Everything you need to get started — already wired up.

17

Tasks

3

Milestones

4

Dependencies

1

Brackets

Frequently asked

Is the Cloud Migration template free?

Yes. The Cloud Migration template is included in GANTT360°'s free plan. Create up to 3 charts for free with PNG export. For editable .pptx export and unlimited charts, upgrade to Pro at €12/month.

Can I customize this template?

Absolutely. Every element is editable — drag bars to change dates, add or remove tasks, rename groups, change colors with your own theme, and adjust milestones. The template is a starting point, not a locked layout.

What formats can I export to?

GANTT360° exports to editable PowerPoint (.pptx) with real shapes (not images), PDF (vector), and PNG. You can also generate a shareable link or embed the chart via iframe.

How long does a typical enterprise cloud migration take?

For a mid-size enterprise (50-200 applications), plan for 9-18 months from assessment to full migration. The assessment and landing zone take 2-3 months. The pilot takes 1-2 months. Production waves take 6-12 months depending on application complexity. On-prem decommission adds 1-2 months at the end.

Should we go multi-cloud or single cloud?

For most organizations, single cloud is the right choice. Multi-cloud adds operational complexity, prevents you from using cloud-native services, and requires team expertise across multiple platforms. Go multi-cloud only if you have a hard regulatory requirement or a genuine need for provider-specific services (e.g., Azure for Microsoft workloads, AWS for everything else).

What is the typical cost difference between on-prem and cloud?

In Year 1, cloud is typically 10-30% more expensive than on-prem due to dual-running costs and over-provisioning. By Year 2-3, with proper optimization (right-sizing, reserved instances, auto-scaling), cloud should be 15-25% cheaper than on-prem. The real savings come from avoided capital expenditure and operational agility, not from lower monthly bills.

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