What is Manufacturing ERP software and how is it different from MRP?

Manufacturing ERP software runs the whole business in one system: finance, sales, purchasing, stock, CRM and production. MRP (Material Requirements Planning) covers the manufacturing side only, working out what materials you need, how many and when. Most modern ERP systems include MRP as standard, so for most growing UK manufacturers the real choice is between adding MRP to your accounts package or moving everything into one ERP.

Put simply:

• MRP (Material Requirements Planning) focuses on manufacturing, inventory control and production planning.
• ERP (Enterprise Resource Planning) manages the entire business, including finance, sales, purchasing, customer relationships, reporting and manufacturing. Most modern ERP systems include MRP functionality as standard.

This guide explains the practical difference between MRP and ERP, where each system fits, and how to decide which approach is right for a manufacturing business as it grows.

Industry is full of acronyms, and few cause more confusion than ERP and MRP. While the two systems are closely related, they solve very different business challenges.

If you are reviewing your business processes going grey over the disparate spreadsheets in use, duplicate data entry and human errors happening daily, and are therefore considering a manufacturing solution, or planning for future growth, understanding the difference between ERP and MRP is an important first step.

What is the difference between ERP and MRP?

Key differences - at a Glance

Both are usually sold on subscription, with support included.

What is an MRP system?

Material Requirements Planning (MRP) software is a manufacturing management solution designed to answer six key questions:

1. What materials do we need?
2. How much do we need?
3. When do we need them?
4. When will we manufacture our finished product?
5. What are accurate lead times?
6. Can I trace my finished products and components?

By combining customer demand, production schedules, inventory levels and Bills of Materials (BOMs), an MRP system ensures materials are available when required while reducing excess stock and unnecessary costs.

Core Inputs

An MRP system typically relies on:

• Master Production Schedule (MPS)
• Bill of Materials (BOM)
• Current inventory records
• Supplier lead times
• Purchase order information

Key Benefits of MRP

A well-implemented MRP solution can:

• Reduce manual data entry
• Improve production planning
• Optimise inventory levels
• Reduce stock shortages and excess stock
• Lower operational costs
• Improve profitability
• Track subcontracted work
• Provide full product and component traceability

Many manufacturing businesses also extend their MRP capability with additional tools such as:

• Shop Floor Data Collection
• Barcode scanning
• Capacity planning
• Graphical scheduling

These additions provide greater visibility of resource utilisation, machine availability and production bottlenecks. MRP extended in this way is often called MRP II, or manufacturing resource planning.

What modules are included in an MRP system, and why do you need them?

The following modules are common building blocks in many MRP systems. Not every business will need every module from day one, but each one addresses a specific manufacturing challenge, from accurate stock control to production visibility and scheduling.

Stock Control: Building a Reliable Foundation

One of the first steps when implementing an MRP system is recording accurate stock levels for all inventory, including raw materials, consumables, purchased components, and sub-assemblies.

Once these figures are entered and maintained through daily transactions, the MRP system becomes the primary source of truth for inventory. Regular stock-takes then become a verification process rather than a necessary exercise to determine actual stock levels.

Accurate stock data means planners, buyers, and production teams always know what is available, what is allocated, and what needs replenishing.

The win

• Significantly reduce manual stock-checking activities.
• Quickly identify and investigate discrepancies.
• Improve inventory accuracy and reduce stock-related delays.
• Gain confidence in planning and purchasing decisions.

Bills of Materials (BOMs): Complete Product Visibility

The Bill of Materials is at the heart of any MRP system. It defines the raw materials, components, labour, packaging, and other resources required to manufacture a product.

Modern MRP systems support multi-level or "exploded" BOMs, providing complete visibility of finished products and the hierarchy of sub-assemblies that sit beneath them.

Whether manufacturing standard products or producing bespoke customer orders, BOMs can be copied, amended, and adapted quickly. This flexibility enables manufacturers to respond to changing customer requirements whilst maintaining full traceability of any design or specification changes.

Many systems also provide comprehensive audit trails, showing precisely what changed, who made the change, and when it was made.

By incorporating labour, carriage, packaging, and overhead costs within the BOM structure, manufacturers can better understand their true production costs and protect profit margins.

The win

• Easily copy and modify existing BOMs.
• Update material changes across multiple products.
• Maintain complete audit trails.
• Improve cost accuracy and purchasing visibility.
• Clearly understand future material demand.

Quotation Management: Faster, More Accurate Pricing

Generating accurate quotations can be challenging when material prices fluctuate and manufacturing costs change frequently.

Many MRP solutions include integrated quotation management functionality that allows manufacturers to estimate costs and calculate selling prices directly from the latest production and purchasing data.

Rather than manually recreating quotes, users can duplicate existing quotations, track multiple revisions, and adjust specifications while retaining historical versions. This provides complete visibility of customer negotiations and pricing changes.

Costs can typically be broken down into:

• Materials
• Labour
• Machine time
• Overheads
• Subcontractor costs

Pricing rules can also be applied automatically, allowing businesses to calculate prices based on fixed margins, mark-up percentages, or fixed-price strategies while supporting multiple quantity breaks.

The win

• Produce quotations faster.
• Reduce pricing errors.
• Improve profit visibility.
• Maintain historical revisions and audit trails.
• Respond quickly to customer changes and enquiries.

Production Planning: Producing What You Need, When You Need It

A key strength of MRP lies in its ability to balance demand against available resources and inventory.

The Master Production Schedule (MPS) brings together information from:

• Sales orders
• Forecast demand
• Works orders
• Reorder levels
• Make-to-stock requirements

The system then evaluates whether current stock and incoming supplies can satisfy demand.

Material Requirements Planning takes this further by identifying shortages and generating recommendations for purchasing components or manufacturing sub-assemblies and finished goods. These recommendations are typically rule-based and consider lead times, stock policies, and purchasing requirements.

Many systems allow recommendations to be converted directly into purchase orders or works orders, eliminating duplication and manual data entry.

This helps businesses embrace a "Just in Time" approach, reducing excess stock whilst ensuring materials arrive when required.

The win

• Improve delivery performance.
• Reduce stockholding costs.
• Identify shortages before they become problems.
• Automate purchasing and production planning.
• Produce planning information in minutes rather than hours.

Shop Floor Data Collection: Real-Time Manufacturing Insight

Many MRP solutions offer Shop Floor Data Collection functionality to capture activity directly from the production environment.

This may involve:

• Workstations on the shop floor
• Barcode scanners
• Tablets or handheld devices
• Touch-screen terminals

Operators can record production progress, labour time, machine activity, stock movements, and completed operations in real time.

This information provides accurate visibility of Work in Progress (WIP) and allows management teams to monitor production efficiency as work moves through the factory.

The win

• Track production progress in real time.
• Improve visibility of Work in Progress.
• Monitor labour and machine utilisation.
• Reduce delays caused by outdated information.
• Improve stock transaction accuracy.

Warehousing: Knowing Exactly Where Your Stock Is

Effective warehouse management is essential for maintaining inventory accuracy and supporting efficient production operations.

Modern MRP systems provide multi-warehouse functionality, allowing businesses to manage stock across multiple locations whilst maintaining complete visibility.

Features often include:

Multi-Warehouse Management

Manage inventory across multiple sites, stores, or warehouse locations, feeding directly into planning and works orders.

Real-Time Stock Control

Synchronise inventory information with financial systems to provide accurate stock, allocated stock, free stock, and goods-on-order figures.

Stock by Location

Track inventory down to specific warehouse locations, bins, and storage areas.

Traceability

Manage batch numbers, serial numbers, use-by dates, and sell-by dates to maintain compliance and quality control.

Goods In and Goods Out

Streamline receiving and dispatch processes through barcode labelling, automated Goods Received Notes (GRNs), and integration with purchase orders.

The win

• Instantly locate stock.
• Improve traceability and compliance.
• Reduce picking errors.
• Support FIFO (First In, First Out) inventory management.
• Improve warehouse efficiency.

Graphical Scheduling: Maximising Resource Efficiency

For manufacturers with complex production environments, graphical scheduling tools provide an additional layer of control.

These visual planning tools allow businesses to schedule production based on available resources, including:

• Machine capacity
• Labour availability
• Skills and competencies
• Production priorities

Planners can immediately see current workloads, bottlenecks, and potential clashes before they affect customer deliveries.

A graphical scheduler helps answer critical questions:

• What is being produced?
• Where is it being produced?
• When will it be completed?
• Who is responsible?

Resource conflicts can be identified before work begins, ensuring production plans reflect the realities of machine maintenance, staff holidays, and other operational constraints.

The win

• Optimise machine and labour utilisation.
• Avoid scheduling conflicts.
• Improve production visibility.
• Increase manufacturing efficiency.
• Deliver customer orders more reliably.

Does an MRP system replace your accounting software?

One common misconception is that an MRP system replaces accounting software.

In most cases, it does not.

MRP systems are designed to manage manufacturing operations while synchronising key financial transactions with the accounting system.

Typical integrations include:

Sales and Purchasing

Purchase orders, invoices and credit notes can be transferred directly into the finance system, reducing duplication and improving accuracy.

Stock Valuation and Costing

Inventory movements, Work in Progress (WIP) values and Cost of Goods Sold (COGS) can be automatically posted to the financial ledger.

For businesses using accounting solutions such as Sage 50, maintaining compatibility between the MRP and accounting environment is essential. In many cases, the hosting requirements of both systems must also align.

What happened to Sage 50 Manufacturing?

Sage stopped supporting Sage 50 Manufacturing on 30 September 2021. Cim50 became Sage UK’s preferred option for manufacturers using Sage 50 Accounts, but it is a recommended replacement rather than a direct one, and there are other MRP options that work with Sage 50.

When reviewing MRP options, it is advisable to begin by identifying solutions that integrate seamlessly with your existing accounting platform.

What is manufacturing ERP software?

Enterprise Resource Planning (ERP) takes the principles of MRP much further.

Rather than focusing purely on manufacturing, ERP provides a central system that connects every major business function.

Manufacturing ERP software is an ERP with the production side built in, such as bills of materials, production orders and MRP planning, alongside finance, sales and purchasing.

An ERP typically includes:

• Finance and accounting
• Manufacturing
• Purchasing
• Inventory management
• Sales order processing
• Customer Relationship Management (CRM)
• Supply chain management
• Reporting and analytics
• Project management
• Service management

ERP also typically provides:

Increased scope to develop the core solution to meet specific industry requirements. Where industry specific development is required, explore ERP solutions that are themselves development environments such as Dynamics 365 Business Central because costs for development and support will be less and written in standard code that other IT companies can take over should you ever part company with the developer!  (Got to think ahead – right?)

Smoother integration with other APIs you may rely on – such as integrating with a courier portal for example or an e-commerce platform such as Shopify.

By bringing all departments together within a single database, ERP provides a unified view of business performance and eliminates the need for multiple disconnected systems.

Key Benefits of ERP

The primary advantage of ERP is real time visibility.   A central point of truth for all staff who have access to your ERP.

When all business data resides within a single system, departments can work from the same information in real time.

Benefits often include:

• Reduced duplication of data
• Improved reporting
• Better financial visibility
• Enhanced customer service
• Stronger inventory control
• Streamlined business processes
• Improved collaboration between departments
• Greater scalability for growth

Better business decisions overall

For growing manufacturers, ERP also removes many of the data silos created when separate accounting, manufacturing, CRM and reporting systems are used independently.

Does MRP software include CRM and service management?

Another important consideration is customer relationship management.

Some standalone MRP systems provide limited CRM functionality, while others rely on integration with platforms such as HubSpot or Salesforce.

ERP solutions typically incorporate CRM functionality or provide much tighter integration across sales, service and operational teams.

Similarly, many MRP systems have limited service management capabilities. Businesses that provide field service, maintenance contracts or return-to-base repairs often require additional specialist solutions to complement their manufacturing software.

ERP platforms are better suited to organisations that require manufacturing and service operations to operate within a single environment.

Why are you reviewing MRP & ERP solutions now?

Commonly identified ‘crunch’ points include:

Spreadsheets

We have relied on spreadsheets for years, but we know that there is data in there that is not reliable.

Unreliable lead times quoted

An order for one of our customers went out late because we could not get the materials in time to meet the lead time we quoted. 

Inaccurate costings

We completed a production batch recently and discovered after the event that we had under costed the product and the profit margin just isn’t good enough.

Lack of Inventory Controls

Our latest stock take shows a large discrepancy that no-one can explain.  Which was the last accurate stock take?  Have materials been stolen or accounted for incorrectly?

We need to grow to meet demand

We have won several new customers but our current processes are manual and time hungry.  We need to become more efficient to meet the new demand.

Satisfying supply chain demands

These new customers are in sensitive supply chains, so we need to be able to provide traceability and audit information on a weekly basis.  We do not have the administration resource to manually put this together.

Seeking clear information

We are aware that Sage has some kind of ‘manufacturing’ capabilities, but we are unclear as to what they are, what software we need and what that software will do for us?

We need some transparent advice

A recently visiting Business Consultant/Supplier/Customer/Person down the pub suggested we look at a specific MRP system they have worked with.  We have a quote but no deep understanding as to whether this is what we actually need?

Sound familiar?

So, Which Solution Does Your Business Need?

The answer depends on the complexity of your organisation and your future growth plans.

Choose MRP if:

• Manufacturing is your primary operational focus.
• You are a smaller manufacturer who requires a handful of users for MRP
• Your accounting software already meets your requirements.
• You need better production planning and inventory control.
• You want a lower-cost manufacturing solution.
• You do not require extensive integration across multiple departments.

Take a look at this case study describing the key advantage of moving to an MRP for the first time – ditching the spreadsheets and centralising information.

Choose ERP if:

• Your business is growing rapidly.
• Multiple departments need access to the same data.
• You require integrated finance, manufacturing, sales and CRM.
• Management needs real-time reporting and visibility.
• You want a scalable platform capable of supporting future expansion.

Once the functional fit is clear, cost becomes the next major decision point. This is where it is important to compare the full business system landscape, not just the headline licence price of one product.

This case study highlights some key wins for a growing company who needed more than Accounts + MRP could provide.

How much does ERP cost compared to MRP?

When comparing ERP and MRP solutions, it is important to look beyond the headline licence costs. While implementation costs for an ERP system are typically higher, the overall long-term cost difference can be significantly smaller than many businesses expect.

An ERP solution consolidates multiple business functions into a single platform, often replacing separate accounting, MRP, CRM and reporting systems. Therefore, when evaluating costs, you should consider the total technology spend, including:

• Accounting software licences
• MRP software licences
• CRM software licences
• Server hosting and support costs
• Infrastructure maintenance
• Periodic server replacement, typically every five years
• Third-party integration and support costs

In some cases, particularly organisations with lower user numbers, an ERP solution can result in lower ongoing software licensing costs once these individual systems are combined.

Product Example (Prices Correct as of September 2026)

The example below compares a traditional accounting and MRP deployment with a modern ERP solution. It is important to remember that there are many ERP and MRP products available, and costs can vary considerably between solutions.

Option 1: Cim50 and Sage 50 (3 Users)

Implementation timeline 3 - 4 weeks

Annual Software Cost: (2 – 5 user band Sage 50 Accounts Professional + Cim50 modules without Shop Floor Data Collection or Graphical Scheduler)
£5,737 + VAT

Implementation Cost (for existing Sage 50 users):
Approximately £7,500 + VAT

What’s included?

Manufacturing data migrated from Excel spreadsheets or legacy MRP with full Sage 50 upgrade to sit alongside Cim50. Training, report set up.  No customisation. Full business partner support.

How is this solution hosted?

Server or Azure hosting required with appropriate data back-up protocols (not included in annual software cost). As a rough guide, Azure hosting is around £400 a month (£4,800 a year). An on-premise server costs around £8,000 to replace every five years (about £1,600 a year), plus roughly £1,500 a year for security software, depending on what you use.

Annual cost including hosting: approximately £8,837 to £10,537 + VAT

Option 2: Microsoft Dynamics 365 Business Central Premium (3 Users)

Implementation timeline 4 – 16 weeks*

*Why such a range of project duration?

Because an ERP offers more, there is more to set up and learn. Plus, there is more scope to develop features to precisely meet industry needs as we have already discussed.  A ‘typical’ project including data migration and training could be 4 weeks.  A project that also requires the following:   complex specific development & customisation, along with full data migration and training could be 16 weeks.

How is this solution hosted?

No server, hosting or back up required for a browser based ERP.

Annual Software Cost:
£3,045.60 + VAT

Implementation Cost (migrating from Sage 50):
Approximately £30,000 + VAT

What’s included?

Data migration from accounts and manufacturing, setting up reports, training across all modules with full partner consultancy and support.

It is also worth noting that this Business Central example includes CRM functionality within the solution. As a browser-based, cloud-first platform, Business Central also removes the need for an on-premise server or Azure hosting, which can reduce hardware, maintenance and support requirements over time.

What Does the ROI Look Like?

Based on software licence savings alone, the additional £22,500 implementation investment for Business Central would be recovered in around eight years. Once hosting is included, that comes down to around three years against Azure hosting, or just under four years against an on-premise server.

What else substantially contributes to your Return on Investment?

Many businesses achieve further returns through:

• Improved operational efficiency
• Reduced manual data entry
• Better reporting and visibility
• Elimination of duplicate systems
• Increased automation
• Reduced IT infrastructure costs
• Improved scalability as the business grows

For this reason, the business case for ERP should be assessed on both financial savings and operational improvements. Whilst implementation costs are usually higher than those associated with an MRP system, the long-term benefits can often justify the investment, particularly for businesses looking to improve visibility, efficiency and future scalability.

How do your options compare as you grow?

Let’s do a simple, final comparison.

This final comparison does not cover every nuance of your specific circumstances, but it provides a useful starting point if you are deciding whether to continue as you are, move to MRP, or invest in ERP.

Final Thoughts

MRP and ERP are not competing technologies. In fact, they are closely connected.

MRP is designed to help manufacturers produce efficiently by managing materials, stock and production schedules. ERP builds on those capabilities by integrating manufacturing with finance, sales, purchasing, CRM and wider business operations.

For smaller manufacturers with an established accounting system, an MRP solution may provide everything required. However, as businesses grow and operational complexity increases, an ERP often becomes the natural next step.

The real question is not always ERP or MRP?

More often, it is whether your business has reached the point where a standalone manufacturing solution or collection of disparate solutions, is no longer enough, and the benefits of a fully integrated ERP platform begin to outweigh the additional investment.

If this article has been ‘food for thought’ and you want to start a conversation with an expert team, then get in touch. Qi will provide you with honest and practical advice. We implement both MRP and ERP solutions and we will signpost you to customers who have already been through the selection process.