Manufacturing · ERP Migration
Shoptech E2 to ERPNext migration with a custom estimation engine for aerospace parts
A precision plastics manufacturer serving aerospace and industrial clients, moving off Shoptech E2 onto ERPNext — with a purpose-built estimation engine for complex, multi-operation quotes.
At a glance
The engagement, in brief
The challenge
Where they started
Piper Plastics quotes complex, engineered parts where pricing depends on materials, multi-operation routing, and machine time. Shoptech E2’s estimating couldn’t model that cleanly — and the closed platform made every change a fight.
- Estimating engineered aerospace parts meant fighting E2’s rigid quoting model
- Pricing logic — price-per-hour labor, material markup, BOM rollup — lived in spreadsheets alongside the ERP
- A closed, per-user platform with limited room to customize workflows
- No clean path to integrate modern tooling or automate the quote-to-order handoff
What we built
How we solved it
Full E2 → ERPNext migration
- Customer and vendor masters with open balances
- Item masters and multi-level BOMs for engineered parts
- Open quotes, jobs, and orders carried across
- Chart of accounts and opening balances reconciled
Custom Estimate DocType
A purpose-built estimation engine on the Frappe framework — modeling PPH-based labor pricing, material markup rules, and BOM-driven cost rollup, with version control on every quote.
Quote-to-order, integrated
Approved estimates flow straight into Sales Orders and production — no re-entry, no spreadsheet hand-off — with full traceability from quote to shop floor.
An open foundation
Built as a standalone Frappe app that survives ERPNext upgrades — Piper can extend fields, workflows, and integrations without vendor lock-in or per-user fees.
The results
What changed
- Complex aerospace parts quoted accurately, in one system
- PPH and material-markup pricing logic built into ERPNext — out of spreadsheets
- Estimates flow to orders and production with full traceability
- A customizable, upgrade-safe platform replacing a closed one
More work