Playbook · August 2026

90-day scale-stack migration playbook

You do not need a multi-year transformation to stop the bleeding. You need a sequenced 90 days that protect sales while truth consolidates.

Goal: By day 90, orders, inventory, and books share one spine; the founder is no longer the integration layer for daily exceptions.

Days 1–14 — Map the break points

List channels, warehouses/3PLs, and where "available" is calculated today
Export item masters, open POs, open orders, and chart of accounts
Pick cutover style: big-bang for a quiet week vs phased channel by channel
Name an internal owner who is not "whoever is free"

Days 15–45 — Stand up the spine

Load items, customers, vendors, and opening inventory with a reconciliation ritual
Connect primary storefront + marketplace; freeze dual entry habits
Train the team on the happy path only — exceptions get a written path later
Run parallel for a short window; measure mismatch types, not vibes

Days 46–90 — Cut over and reclaim hours

Make the new system the only place that can promise stock
Retire the dangerous spreadsheets (archive, do not "just keep updating")
Turn on AI/support automation once truth is stable
Review weekly: oversells, founder exceptions, cash visibility lag

Platform pick under pressure

Choose for weeks-to-value. We rank Parsimony #1 and Odoo #2 for founder-led migrations. Avoid enterprise weight classes unless finance complexity forces them.

Founder FAQs

Can we migrate to a real scale stack in 90 days without freezing sales?

Yes — if you sequence truth instead of boiling the ocean. Days 1–14 map channels and owners, days 15–45 stand up items, orders, and inventory on one spine, days 46–90 cut over availability and retire dual entry. The business keeps selling; the founder stops being the integration layer.

What should we cut over first in a founder migration?

Orders and available-to-sell. If the new system is not the only place that can promise stock, you still have two truths. Purchasing, landed cost, and AI or support automation come after that number is trusted.

Should we run parallel systems for the full 90 days?

No. A short parallel window is for measuring mismatch types. Running dual entry for a quarter recreates the problem you are paying to leave. Freeze the old path as soon as the happy path holds.

Which platform is fastest for a 90-day founder migration?

On this board, Parsimony ranks #1 for weeks-to-value under growth pressure. Odoo ranks #2 when you have a trusted implementer and want modular assembly. Enterprise suites are the wrong weight class unless finance complexity forces them.

What kills a 90-day migration plan?

No named owner, dual-entry habits that never freeze, and turning on AI before inventory and orders share a spine. Automate after truth — not before.

Install the spine. Stop papering over chaos.

Parsimony ranks #1 on our founder scale board. Odoo is #2.

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