
VMware Migration Readiness (Google Sheets Tool) vs. Agentless Dependency Mapping Tools
Stage-0 baseline (vCenter + backup CSVs, local) and Stage-1 mapping: how they fit together.
TL;DR
Purpose: Stage-0 = fast, local readiness baseline; agentless dependency mapping = deep application flow maps for grouping and wave planning.
Inputs: Stage-0 uses vCenter + backup CSVs; mapping tools inspect live network/process flows (typically without agents).
Outputs: Stage-0 delivers per-VM readiness with reasons + exec rollups; mapping tools deliver dependency maps, move-set grouping, and inputs to timelines/cutovers.
Looking for the main VMware Migration Readiness (Google Sheets Tool) page where you can download the tool? Click here.
What each does
Stage-0 Readiness Baseline (this tool)
Inputs: vCenter inventory CSV + backup job inventory CSV.
Runs locally: Google Sheets (and an Excel version) — no agents, no SaaS ingest.
Normalization: deduped VM names, OS family, any-tag production/critical/compliance, uptime class.
Backup posture: missing/stale backups, short retention, irregular frequency, no offsite.
Output: Per-VM readiness with reasons (only causes that apply) and exec-ready rollups by Cluster / OS family / Uptime / Backup posture.
Why first: minutes-to-signal once set up; vendor-neutral triage (move-sooner vs stabilize/leave-for-now) before heavier tools.
Agentless dependency mapping tools (class)
Goal: discover live application dependencies across VMs/hosts (who talks to whom, ports/protocols, volumes).
How: observe network/process flows (typically via collectors/appliances or integrations) without installing agents on each VM.
Output: Dependency maps, tier grouping, suggested move sets, evidence for change control and wave sequencing.
Why later: requires access, scoping, and time; best applied to cohorts you’ve already shortlisted.
When to use each
Use Stage-0 when you need a triage baseline in hours to brief stakeholders and scope vendor conversations — with no infrastructure changes.
Use agentless mapping when you’re ready to validate dependencies, group move sets, and build wave plans/timelines with confidence.
How they work together (handoff 1-2-3)
Stage-0 shortlist: Identify move-sooner cohorts and stabilize/leave-for-now systems using readiness + reasons.
Targeted mapping: Apply agentless dependency mapping to the shortlisted cohorts to confirm flows, uncover hidden ties, and form move sets.
Planning: Use mapping outputs to finalize waves, timelines, and change windows; carry Stage-0 artifacts forward to avoid re-work.
What carries forward from Stage-0 (not throwaway)
Deduped VM inventory with normalized names and OS family.
Any-tag normalization for production / critical (DB/AD/DNS) / compliance.
Backup posture flags (missing/stale/retention/offsite).
Uptime class for change-averse candidates.
Cohort shortlist by cluster/OS/role for targeted mapping.
Assumptions register (thresholds) and a readiness rules table (audit trail).
Optional CSV bundle (inventory + flags + cohorts) ready to hand to Stage-1 tools.

Can we continue guiding beyond Stage-0?
Yes. If deeper assessment is warranted, we’ll help scope the right next step, ensure Stage-0 artifacts are reused by mapping/capacity/cost workflows, and keep assumptions consistent across phases. Vendor-neutral.
What this page is not
A vendor review or endorsement. “Agentless dependency mapping tools” refers to a class of solutions that inspect live flows to derive application dependency graphs.
FAQ
Stage-0 vs. agentless dependency mapping tools
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No. Stage-0 prepares it by cleaning data, flagging risks, and shortlisting cohorts so mapping time is focused.
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No. The deduped inventory, flags, and cohorts from Stage-0 become inputs to mapping and wave planning.
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Lower friction and faster signal for executives; you avoid scoping/mapping the entire estate and focus on the right systems first.
Legal note
All product names are trademarks of their respective owners. This page describes how a Stage-0 baseline complements a class of tools; it is not an evaluation of any specific vendor.