Arius Automation

Services > Custom ERP Development

CUSTOM ERP DEVELOPMENT

An ERP built around how your operations actually run.

Custom ERP development for mid-market manufacturers, distributors, and field service businesses that have outgrown QuickBooks and cannot justify SAP. Built from scratch, owned by you, no modules you will never use.

A custom ERP dashboard with four KPI cards (Revenue $1.84M up 12.4%, AP Outstanding $284K down 8.2%, Inventory Value $612K up 3.1%, Open Orders 47 up 14 this week), a revenue trend line chart, and three recent transactions.

Representative custom ERP dashboard. The modules, KPIs, and data model are designed around your specific operations.

Book an ERP discovery call

Custom ERPs shipped in manufacturing, distribution, field service, and food and beverage.

WHERE CUSTOM FITS

There are three options. Most companies are in the wrong one.

The mid-market gap in ERP software is real. Small accounting tools run out of headroom. Enterprise platforms require implementation partners and multi-year timelines. Custom fills the gap for businesses that need operational software, not accounting software, and cannot absorb a $2M SAP implementation.

SMALL BUSINESS TOOLS

QuickBooks, Xero, FreshBooks

Great for businesses under 50 people that primarily need accounting. Breaks down when you have serious inventory, production, or operational complexity that lives outside the accounting layer.

+Works well up to about 50 employees
+Cheap and fast to set up
+No real operations or manufacturing support
+Spreadsheets fill the gaps within 2 years
THE MIDDLE GROUND

CUSTOM ERP

Built for your business. Owned by you.

Right for mid-market businesses that need operational software beyond accounting, have industry-specific workflows that generic ERP modules do not handle, and want to own the system instead of renting it forever.

Fits your actual operational data model
One build cost, no per-seat licensing
Modules in the order that fits your business
You own every line of code

ENTERPRISE PLATFORMS

SAP, Oracle, Dynamics 365

Built for large enterprises with dedicated IT teams and budgets to match. Implementation typically costs two to five times the license fee. Implementations run 18 to 36 months and frequently overrun both time and budget.

+Right for 500+ employee enterprises
+Implementation: $2M to $20M+
+18-36 month implementation timelines
+Requires dedicated internal ERP team

WHAT WE BUILD

Eight modules. You pick the ones your business needs.

Not every business needs every module. We build the ones that solve your problems and skip the ones that do not. The system is designed so you can add modules later as the business evolves.

THE BOOKS

Finance and accounting

General ledger, accounts payable, accounts receivable, invoicing, bank reconciliation, and financial reporting. Built to the exact chart of accounts and reporting structure your finance team uses, not a generic template.

WHAT YOU HAVE

Inventory management

Real-time stock levels across locations, SKU management, lot and serial tracking, reorder rules, and physical count workflows. Inventory that stays accurate because the system enforces it, not because your warehouse team is diligent.

WHAT YOU BUY

Procurement and purchasing

Purchase requisitions, PO approval workflows, vendor management, receiving, three-way matching against invoices, and vendor performance tracking. The full procure-to-pay cycle without a separate system.

WHAT YOU SHIP

Order management and fulfillment

Sales orders, picking and packing workflows, shipping integrations, customer-facing order status, and returns handling. Order-to-cash without spreadsheets, separate warehouse software, or manual data entry between systems.

WHAT YOU MAKE

Production and manufacturing

Bills of materials, work orders, production scheduling, shop floor data collection, and cost tracking. For businesses that make the things they sell, this is the module that justifies the build on its own.

YOUR PEOPLE

HR and workforce

Employee records, department structure, time and attendance, leave management, and the access control layer that ties permissions across every other module to your org chart. Built to your specific workforce structure.

THE NUMBERS

Reporting and dashboards

Executive dashboards, operational KPIs, financial summaries, and the ad-hoc query layer that lets your analysts ask questions the standard reports do not cover. The reports your CFO, ops director, and warehouse manager each actually need.

THE RECORD

Audit and compliance

Immutable audit logs of every state change, approval workflows with documented sign-offs, compliance reporting for your industry, and the data residency and access control posture your auditors expect. Built in from the start, not added as an afterthought.

WHY ERP PROJECTS FAIL

ERP projects fail in four predictable ways. We build against all of them.

Most ERP failures are not technical. They are process failures that happen before and after the build. Understanding them in advance is the only way to design around them.

FAILURE MODE

Scope explosion during build

The discovery phase surfaces ten more requirements than anyone expected. Each one sounds small. By month three the project is twice the original size and nobody can agree on what to cut.

HOW WE MITIGATE IT

Fixed discovery phase before any code is written
Written design document approved before build starts
Formal change order process for scope additions
Phased delivery so value ships before scope expands
FAILURE MODE

Forcing the business to fit the software

The custom ERP gets built around how the team thought things worked, not how they actually work. By launch, every department has a complaint and a workaround request. Adoption stalls.

HOW WE MITIGATE IT

Operational interviews with people who do the work, not just leadership
Process maps reviewed by frontline staff before architecture is finalized
User testing in every sprint, not just at the end
Pilot rollout with power users before full deployment
FAILURE MODE

Post-launch disengagement

The build team ships the system, hands over documentation, and disappears. Three months later there are bugs nobody fixed, features nobody built, and a team that has given up on the system.

HOW WE MITIGATE IT

Retainer option for ongoing development from day one
Documented handoff with runbooks and architecture diagrams
Internal admin training so your team owns the system
Structured 90-day post-launch support period on every project
FAILURE MODE

Bad data migration

The new system goes live with corrupted, incomplete, or incorrectly mapped data from the old one. Finance cannot close the month. Inventory counts are wrong. Everyone defaults back to the old system.

HOW WE MITIGATE IT

Data audit and field mapping before migration starts
Migration runs during build, not on cutover night
Parallel operation period so both systems run simultaneously
Data validation report signed off before old system is decommissioned

INDUSTRIES WE BUILD FOR

Six industries where generic ERP fails.

Not exhaustive. These are the verticals where standard ERP data models produce the most friction and where custom builds pay off most clearly.

Manufacturing

Production scheduling, bills of materials, work orders, shop floor data collection, and cost of goods sold all need to be first-class objects. Standard accounting software treats manufacturing as an afterthought.

KEY OPERATIONAL OBJECTS

Work OrderBOMProduction RunShop FloorRaw MaterialFinished Good

Distribution and wholesale

Multi-warehouse inventory, complex pricing tiers, customer-specific terms, freight cost allocation, and the order velocity that makes manual processes collapse under load.

KEY OPERATIONAL OBJECTS

WarehouseTransfer OrderPrice TierFreight AllocationCustomer Account

Construction and contracting

Project-based accounting, subcontractor management, change orders, certified payroll, job costing, and the compliance overhead that standard ERP modules struggle to model correctly.

KEY OPERATIONAL OBJECTS

ProjectSubcontractorChange OrderCost CodeCertified Payroll

Field service

Technician scheduling, work order management, parts inventory on vans, customer asset tracking, service contracts, and mobile capture from the field. A category most ERP vendors address poorly.

KEY OPERATIONAL OBJECTS

Work OrderTechnicianAssetService ContractMobile Capture

Professional services

Project billing, utilization tracking, resource allocation, client budgets, time entry tied to invoicing, and the margin visibility that tells you which engagements are actually profitable.

KEY OPERATIONAL OBJECTS

EngagementResource PlanUtilizationTime EntryClient Budget

Food and beverage

Lot tracking for recall readiness, FIFO inventory enforcement, recipe management, production planning against forecasted demand, and the food safety compliance documentation regulators require.

KEY OPERATIONAL OBJECTS

LotRecipeProduction PlanRecall TraceFIFO Queue

REAL PROJECTS

Four custom ERPs shipped to production.

Anonymized for client confidentiality. The shape of the work is real.

MANUFACTURING

A production-first ERP for a precision parts manufacturer.

A 90-person precision machining company had QuickBooks for finance and a patchwork of spreadsheets managing production scheduling, work orders, and inventory. Inventory was routinely wrong. Job costing was done in Excel after the fact. Finance closed the month ten days late every month.

WHY THEY WENT CUSTOM

Manufacturing cannot be bolted onto an accounting system. The production data model, bill of materials, and work order lifecycle are load-bearing. Everything else, including finance, needs to attach to production data rather than the other way around.

WHAT WE BUILT

MODULES

FinanceInventoryProcurementProduction and Work OrdersJob Costing

OPERATIONAL IMPACT

Inventory accuracy from 71% to 98%. Month-end close from 10 days to 3 days.

OUTCOME

98% inventory accuracy

Up from 71%. Job costing moved from Excel to real-time. Monthly close cut from 10 days to 3.

DISTRIBUTION

A multi-warehouse operations platform for a regional distributor.

A beverage distributor running 4 warehouses across two states had a legacy ERP from 2009 with no vendor support, no modern integrations, and a codebase that nobody on the team understood. Every customization request took months and cost five figures.

WHY THEY WENT CUSTOM

Legacy systems become unsupportable. The cost of maintaining old software eventually exceeds the cost of replacing it. The trigger here was a failed integration attempt with a new logistics partner that exposed how brittle the old system had become.

WHAT WE BUILT

MODULES

InventoryOrder ManagementProcurementWarehouse OperationsReporting

OPERATIONAL IMPACT

Order processing time cut by 60%. 4 warehouses on one real-time inventory view.

OUTCOME

60% faster order processing

Four warehouses unified on a single real-time inventory system. Order errors down 84%.

FIELD SERVICE

A field operations system for an HVAC service company.

A commercial HVAC company with 45 technicians had scheduling in one tool, parts inventory in another, invoicing in QuickBooks, and service history in a shared Google Sheet. Technicians spent 40 minutes per job on admin. Customer complaints about repeat visits for missing parts were a monthly occurrence.

WHY THEY WENT CUSTOM

Field service is mobile-first and asset-centric. The customer asset, its service history, and the parts inventory on each van need to be linked in a way that standard ERP never models. Off-the-shelf field service software exists but none of them handled the custom service contract structure this client had.

WHAT WE BUILT

MODULES

Work OrdersTechnician SchedulingMobile AppParts InventoryService ContractsInvoicing

OPERATIONAL IMPACT

Admin time per job: 40 min to 8 min. Repeat visits for missing parts: down 91%.

OUTCOME

91% reduction in repeat visits

Parts on-hand data in the mobile app before dispatch. Admin time per job from 40 minutes to 8 minutes.

FOOD AND BEVERAGE

A lot-tracking and production planning system for a specialty food brand.

A specialty food manufacturer with 22 SKUs and a retail presence in 1,400 stores had no reliable way to trace ingredients back to supplier lots in the event of a recall. Production planning was manual. They had narrowly avoided a recall situation that would have required them to pull all 22 SKUs because they could not isolate the affected lot.

WHY THEY WENT CUSTOM

Recall readiness is not optional in food manufacturing. The FDA expects you to be able to trace from finished product to raw material lot in hours, not weeks. Standard ERP lot tracking exists, but this client had a co-manufacturing relationship and custom recipe structure that no off-the-shelf system handled cleanly.

WHAT WE BUILT

MODULES

Lot TrackingRecipe ManagementProduction PlanningProcurementRecall Trace

OPERATIONAL IMPACT

Recall trace time from weeks to under 4 hours. FDA audit passed with zero findings.

OUTCOME

Recall trace: weeks to under 4 hours

Full ingredient-to-product lot traceability. FDA audit passed with zero corrective actions.

MIGRATION

Most clients come to us with a system they need to leave.

Almost nobody builds a new ERP from a blank slate. Years of financial data, inventory history, vendor records, and transaction logs need to land cleanly in the new system. Migration is part of every engagement.

OUR APPROACH

Audit and map every field first.

Before any data moves, we audit your existing system and map every field to the new schema. Some fields translate cleanly. Some require transformation. Some are archived rather than migrated. The mapping document is a deliverable.

Migrate during the build, not on launch night.

Data migration runs in parallel with development. By cutover day, every record, every transaction, and every attachment is already in the new system and validated against the source. No last-minute surprises.

Run both systems in parallel briefly.

For one to two weeks after launch, both systems run simultaneously. New activity goes into the new ERP. The old one is read-only. Your team has a safety net and time to find anything we missed.

Decommission the old system cleanly.

After the parallel period, the old system gets archived as a read-only historical record. The license is cancelled. The savings start immediately. The archive stays accessible for audit purposes.

SYSTEMS WE MIGRATE FROM

QuickBooks
Xero
Sage
NNetSuite
SAP
DDynamics
OOracle
FFreshBooks
WWave

Plus legacy custom systems, spreadsheet-based operations, paper-based records, and anything else your business has been running on. If it holds data your business needs, we can migrate it.

THE BUILD PROCESS

Five phases over six to nine months.

A real custom ERP is a real software project. Timelines are honest. Each phase below includes what we deliver and what risk it mitigates.

01

Operations audit and discovery

4-6 WEEKS

Interview every department that will use the system. Map current workflows, data sources, integration points, and the workarounds your team has built. Identify what works, what is broken, and what the system needs to enforce. This phase produces the written design document that drives the entire build.

KEY DELIVERABLE

Written design doc, data model schema, integration map, phased rollout plan

RISK MITIGATED

Scope creep starts here. Capturing requirements in writing before code is written prevents the most expensive changes.

02

Architecture and technical design

3-4 WEEKS

Select the tech stack, design the system architecture, define the module boundaries, plan the integration layer, and document the data model in full. Reviewed and approved by your team before any development begins.

KEY DELIVERABLE

Technical architecture document, API contract, infrastructure plan, approved data model

RISK MITIGATED

Architectural decisions made late in a build are expensive. Every week spent here saves four in the build phase.

03

Phased module development

12-20 WEEKS

Core data model and authentication first, then load-bearing modules (typically finance and inventory), then operational modules in priority order. Built in two-week sprints with demos to your team. You see working software every two weeks, not at the end of a six-month build.

KEY DELIVERABLE

Working software deployed to staging after each sprint. Production releases per agreed phase schedule.

RISK MITIGATED

Scope additions during build are the primary cost driver. Each change request goes through a formal process so you see the cost and timeline impact before approving it.

04

Data migration and pilot

4-6 WEEKS

Migrate all historical data from your existing systems. Run a pilot with a small group of power users before full deployment. Fix issues found in pilot. Data migration runs in parallel with the build so by launch day, every record from the old system is already in the new one.

KEY DELIVERABLE

Validated data migration report, pilot feedback incorporated, production-ready system

RISK MITIGATED

Bad migration data is the most common cause of failed ERP launches. Migration validation is a formal deliverable, not a checkbox.

05

Rollout, training, and handoff

6-12 WEEKS

Full deployment by department. Training for each team. Old system put into read-only mode during the parallel period, then decommissioned. Runbooks, architecture docs, and admin training so your team owns the system going forward.

KEY DELIVERABLE

Trained teams across all departments, system documentation, admin runbook, decommissioned legacy system

RISK MITIGATED

Post-launch disengagement kills ERP adoption. The parallel period and structured support arrangement are the safety net.

6-9 mo

TYPICAL DURATION

Bi-weekly

DEMO CADENCE

3-6 mo

POST-LAUNCH SUPPORT

FAQ

Frequently asked questions.

What operations leaders and technical buyers ask before committing to a custom ERP build. Click to expand any answer.

WALK US THROUGH YOUR OPERATIONS

Show us where your current systems break down. We will tell you whether a custom ERP is the answer.

Forty-five minutes. Walk us through how your business operates, where the spreadsheets live, and where your current software stops working. We will scope what a custom ERP would look like, what it would cost to build, and what timeline to expect. Sometimes the answer is to configure something off-the-shelf, and we will say so.

Book an ERP discovery call

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