ERP Buyer’s Guide: How to Choose the Right ERP Software

Choosing an ERP system is a significant business decision. The software may affect finance, inventory, sales, purchasing, customer service, human resources, manufacturing, and reporting across the organization.

This ERP buyer’s guide explains how enterprise resource planning software works, the benefits it may provide, and the factors businesses should evaluate before selecting a platform or implementation partner.

Download the ERP Buyer’s Guide

What Is ERP Software?

ERP software connects business processes such as finance, inventory, purchasing, sales, manufacturing, human resources, customer management, and reporting within a shared system.

• Customer relationship management
• Supply chain management
• Inventory management
• Purchasing and procurement
• Human resource management
• Finance and accounting
• Sales management
• Manufacturing
• Engineering and product operations

By centralizing business data, an ERP system can help authorized users access consistent information, monitor operations, automate routine tasks, and prepare reports without repeatedly transferring data between disconnected systems.

When Should a Business Consider a New ERP System?

A business may need a new ERP system when disconnected software, spreadsheets, or legacy applications begin limiting reporting, process control, integration, or growth.

• Teams repeatedly enter the same data in different systems
• Financial, inventory, or order records frequently disagree
• Important reports require extensive manual preparation
• The current system cannot support new locations or business units
• Required integrations are unavailable or unreliable
• The software is no longer adequately supported

Before replacing the system, determine whether the problem comes from the software itself, poor configuration, inaccurate data, limited training, or inefficient processes.

How to Choose ERP Software for Your Business

Selecting an ERP system begins with understanding the organization’s current problems, operational requirements, and future plans. Vendor demonstrations should begin only after the organization has documented its essential workflows, requirements, and evaluation criteria.

1. Define Business Outcomes and ERP Requirements

• Essential: The ERP cannot be selected without this capability.
• Important: The capability provides meaningful value but may have an acceptable workaround.
• Optional: The feature is useful but should not determine the final decision.

Start by identifying why the organization needs an ERP system and what problems the project should address.

Questions to consider include:

• Which processes currently rely on spreadsheets or manual work?
• Where is duplicate data being entered?
• Which reports are difficult or time-consuming to prepare?
• Which systems must be integrated?
• Which departments and locations will use the platform?
• Which compliance, security, or audit controls are required?
• How much growth should the system support?

Separate essential requirements from optional features. This makes it easier to compare platforms without allowing an impressive demonstration to distract the selection team from actual business needs.

2. Establish How ROI Will Be Measured

ERP return on investment can be difficult to measure when the organization has not established a reliable operational baseline.

Before implementation, document current performance indicators such as:

• Time required to complete key processes
• Inventory accuracy
• Order processing time
• Administrative hours spent on manual data entry
• Reporting preparation time
• Manufacturing or service delivery costs
• Customer response and resolution times
• Frequency and cost of operational errors

After implementation, the organization can compare these measurements with the original baseline. Targets should be specific and realistic rather than based on arbitrary percentages chosen to make a presentation look convincing.

A basic ERP ROI calculation can compare expected annual financial benefits with the total implementation and operating cost:

ERP ROI = (Total measurable benefits − Total ERP cost) ÷ Total ERP cost × 100

The calculation should also account for implementation time, adoption, maintenance, and the period required to achieve the expected benefits.

3. Request a Process-Based ERP Demo

A generic product demonstration may show attractive dashboards without proving that the system can support the organization’s actual workflows.

Provide vendors with a demonstration script based on realistic scenarios, such as:

• Creating and approving a purchase order
• Receiving inventory and updating stock levels
• Processing a sales order from creation to invoicing
• Managing a return or cancellation
• Preparing a financial or operational report
• Applying user permissions and approval rules
• Handling an exception, error, or incomplete transaction

Ask vendors to demonstrate the complete process, including any manual steps, integrations, custom development, or third-party tools required.

• Use the same demonstration script for every shortlisted vendor.
• Record which steps require customization or third-party software.
• Include at least one exception scenario, not only a successful transaction.

4. Speak With Relevant Customer References

Vendor references are more useful when the reference organization has a similar industry, size, operational model, or implementation scope.

Useful questions include:

• Which commitments did the vendor meet?
• Were implementation deadlines realistic?
• Did the final cost differ from the original estimate?
• Which customizations or integrations were required?
• How responsive was the support team?
• What problems appeared after go-live?
• Which features did not work as expected?
• What would the organization do differently?

A reference that reports no difficulties at all may not provide a complete picture. ERP implementations involve process changes, data migration, configuration, testing, and user adoption. Some complications are normal. The more useful question is how the vendor handled them.

Ask whether the reference is using the same ERP version, modules, deployment model, and implementation partner being proposed to your organization.

5. Calculate the Total Cost of Ownership

The software license or subscription is only one part of the overall ERP investment.

Ask vendors to provide detailed estimates for:

• Software licenses or subscriptions
• Implementation and configuration
• Custom development
• Data migration and cleansing
• Third-party integrations
• Cloud hosting or infrastructure
• User training
• Testing and quality assurance
• Ongoing maintenance
• Technical support
• Version upgrades
• Additional users, modules, or locations

Review the pricing structure carefully. Some costs may be charged per user, transaction, module, environment, storage volume, support tier, or implementation phase.

The ERP software costing guide provides additional factors to consider when estimating an ERP project.

6. Evaluate the ERP Vendor

The software should meet functional requirements, but the vendor or implementation partner must also be capable of supporting the project over the long term.

Review factors such as:

• Experience with similar industries and workflows
• Technical knowledge of the selected ERP platform
• Implementation methodology
• Data migration capabilities
• Integration and customization experience
• Security and quality management practices
• Training and documentation
• Post-implementation support
• Product roadmap and update frequency
• Financial and organizational stability

Businesses should also understand whether they are working with the software developer, an implementation partner, or a reseller. Each model may affect pricing, customization authority, support responsibilities, and access to product updates.

Questions to Ask an ERP Vendor

• How long has your company implemented or supported ERP systems?
• What experience do you have in our industry?
• Are you the product developer, an implementation partner, or a reseller?
• How does your pricing and billing model work?
• Which deployment and hosting options are available?
• How do you manage data security, backups, and disaster recovery?
• What implementation methodology do you follow?
• How will data migration be planned and validated?
• Which integrations are included in the proposal?
• Which requirements will need customization?
• What training is available for users and administrators?
• What support is available after go-live?
• How are support response times defined?
• How often is the software updated?
• How does the system support additional users, locations, or business units?
• What is the expected implementation timeline?
• What assumptions could change the estimated cost or schedule?
• Can you provide references from relevant projects?
• Who owns custom code and project documentation?
• How can data be exported if we change systems in the future?

Compare ERP Deployment and Ownership Models

ERP Model	Potential Advantages	Points to Evaluate
Cloud ERP	Remote access, managed infrastructure, easier capacity expansion	Subscription terms, data location, uptime, integration limits, and export options
On-Premise ERP	Greater infrastructure and hosting control	Internal maintenance, security, backups, upgrades, and hardware costs
Open-Source ERP	Source-code access, customization flexibility, and greater system control	Technical expertise, maintenance, documentation, hosting, and upgrade management
Proprietary ERP	Standardized product development and vendor-managed updates	Licensing, customization restrictions, data portability, and vendor dependency
Hybrid ERP	Gradual modernization across cloud and internal systems	Integration complexity, security boundaries, and divided support responsibilities

Plan Your ERP Selection Carefully

An ERP project should begin with business requirements, process analysis, and measurable objectives. Product demonstrations, vendor references, pricing, technical architecture, support, and implementation capabilities should then be evaluated against those requirements.

NOI Technologies provides ERP consulting, development, integration, migration, and support services for businesses implementing open-source and custom enterprise systems.

Contact NOI Technologies to discuss your ERP requirements and implementation plans.

After selecting a platform, use the ERP development planning guide to define implementation scope, integrations, data migration, testing, training, and post-launch support.