What does a CRM handle, and what does an ERP handle?
CRM stands for customer relationship management. In software, it covers areas such as contacts, relationship history and tasks in sales and service. ERP stands for enterprise resource planning and supports the planning and execution of business operations. The areas included vary from product to product.
You can compare the typical division of tasks using the same criteria. This is a guide, not a rigid boundary:
| Criterion | CRM | ERP |
|---|---|---|
| Central question | What does this customer need, and what do we do next? | What do we need to deliver, provide or bill for this order? |
| Typical work | Handle enquiries, track proposals, manage customer contacts and service cases | Process orders, plan projects or materials, document work and prepare billing |
| Important data | Contacts, conversation history, opportunities, follow-up tasks | Orders, resources, work delivered, items, costs and documents |
| Typical users | Sales, marketing, customer service | Project team, purchasing, operations management, finance |
| Example problem | Nobody knows who will answer the open enquiry | The agreed scope reaches the delivery team incomplete |
This broad distinction between customer interactions and financial or operational workflows is also described in SAP's overview of ERP and CRM. Individual products may handle several of these tasks. Check the features and actual workflow, not just the label on the proposal.
Where do the systems overlap?
Both systems may contain customer data, proposals and order information. An ERP may offer a CRM module, while a CRM application may go beyond contact management. Dynamics 365 Sales is a documented example: Microsoft describes creating orders from quotes. It would therefore be too broad to claim that a CRM cannot manage orders at all.
The depth you need matters. An existing customer field does not replace a complete sales process. Likewise, an order record does not automatically replace resource planning or financial accounting. Ask to see the whole work scenario: which steps does the product handle itself, which does a connected system handle and which remain manual?
There is no fixed time boundary at the sale either. CRM remains relevant after an order is won, for questions, support or further customer contact. ERP work may begin earlier if sales needs capacity or availability information for a proposal. The systems have different centres of attention; the customer process connects them.
Which problem do you solve first?
Start where a specific bottleneck prevents important work. Company size or the number of available modules alone is not enough to decide. The following model helps with an initial assessment; it does not replace reviewing your existing software.
- Enquiries, contacts or follow-up actions get stuck.
- Check the CRM process first: ownership, sales stage and next task.
- Orders, work or resources are hard to coordinate.
- Check the ERP process first: agreed scope, planning and delivery.
- Teams are working, but information does not reach them.
- Check the handover first: data mapping, the authoritative system and feedback.
If sales lacks a reliable next task, a clear CRM workflow may initially be enough. If existing tools cannot support important requirements, see our page on custom CRM softwarefor guidance on defining a suitable scope.
If customer contacts are well organised but order data and operational work are poorly connected, begin on the ERP side. Our introduction to custom ERP software shows which processes and handovers to examine.
Before choosing new software, also check the rules behind the problem. If nobody has authority to decide who takes an order, an additional application will not resolve that missing responsibility by itself.
How do CRM and ERP work together?
An illustrative example from a B2B service business: sales discusses an enquiry and records the agreed scope in the CRM. After confirmation, it passes the required details to order or project delivery. That team plans the work and records progress. Sales receives relevant status information back so it can answer customer questions.
“Synchronise customer data” is not a sufficient requirement for this connection. Clarify which event triggers a handover, which details are required and how successful receipt is recognised. A confirmed commitment might trigger creation of an order, for example. If required information is missing, the work item needs a visible error status and an owner.
Not every piece of information needs to be copied in both directions continuously. A read-only view of the authoritative system may be enough. Freshness requirements depend on the scenario: a date used to make a customer commitment may need different treatment from an occasional report.
Who may change shared data?
For shared data, define where changes are made and who owns their business meaning. “Authoritative” here means that a system is the definitive source for a particular value. Different fields belonging to the same customer can have different owners.
| Information | Authoritative source in this example | Use in the other area |
|---|---|---|
| Contact person and conversation note | CRM / customer team | The project team sees the contact relevant to delivery. |
| Confirmed scope of work | Order processing / order owner | Sales sees the agreed version. |
| Processing or delivery status | ERP / delivery team | Sales uses the status to answer questions. |
| Next customer task | CRM / assigned person | Operational feedback can trigger a new task. |
Test changes and errors too: what happens when two people edit the same address? Is an order duplicated when a transfer is retried? Who notices a missing response? Include these cases in integration testing. An interface should demonstrate the intended handling of unexpected states as well as successful data transfer.
Two systems or one shared solution?
A shared application may fit if its CRM and ERP features adequately cover the required workflows. It can organise shared data and handovers within the same environment. Roles, data rules and responsibilities still need to be defined. A shared product name alone does not establish an end-to-end process.
Two specialised systems may make sense when one area has particular requirements or existing software already works well. Account for connecting them, operating the interfaces and developing them further. Clarify who handles failures and whether a change to one system requires changes to the other.
A third option is to extend the existing system selectively. Perhaps only a handover, a status view or a suitable entry form is missing. Compare this limited change with a broader replacement. What matters is which approach sustainably supports the required workflow.
For every option, understand how data can be exported and who supports configuration, custom extensions and operations. An architecture comparison is incomplete if it considers only the features available on day one.
What affects costs and implementation?
Compare the same business scope: required features, user roles, data migration, integrations, testing, training and ongoing support. A small ERP scope and a heavily customised CRM cannot be meaningfully compared by category alone. A shared solution is not automatically cheaper than two connected applications either.
Effort depends in part on existing data quality, the number and type of handovers and the availability of people who make decisions and review results. Define the first productive workflow and ask for prerequisites and exclusions to be named in the proposal.
Cloud or self-hosting is an additional decision. It describes how software is provided and operated, not whether the business task belongs to ERP or CRM. Check the specific agreed responsibilities, access, operating services and ongoing costs.
How do you assess a concrete proposal?
Take a work item from your business and follow it from enquiry through delivery to subsequent customer care. Record which person works in which system, what information is passed on and who detects an error.
Then ask to see that exact scenario demonstrated. Ask about the normal case, a later change and a failed handover. This reveals whether the proposed features together form the process you need.
Ultimately, choosing a system needs a verifiable answer: which work becomes more reliable after the first step, and who takes responsibility for it?