How Long Does an ERP Implementation Take? Phases and Factors That Affect the Timeline

How long an ERP implementation takes depends mostly on the scope of the project. In a small company with one or two standard modules and a few users, the system can go live within a few weeks, while a project with manufacturing, several warehouses and integrations takes several months. The exact timeline becomes clear after an initial analysis. In this article we explain the phases, the factors that affect the timeline and the ways to speed a project up.

The phases of an ERP implementation

Every project is different, but the phases of an Odoo implementation are almost always the same. Together they make up the timeline.

1. Analysis. We study how the company works: sales, inventory, accounting, purchasing and other processes, which reports are needed and who is responsible for what. At Arter the initial analysis is free.
2. Design and configuration. The required modules are selected and the processes are set up in the system: product records, warehouses, price lists, user roles and access rights.
3. Data migration. Products, customers, suppliers, stock levels and open documents are moved from the old system or from Excel.
4. Testing and training. The team works in the system with real examples, errors are fixed and every user learns to do their job in the system.
5. Go-live and support. The system starts running day to day. There are many questions in the first weeks, so support is provided for several weeks after go-live.

What affects the timeline

Two projects with the same number of modules can take different amounts of time. The main reasons are:

• Number of modules. Sales and inventory alone are one thing; accounting, manufacturing, payroll and CRM together are quite another.
• Number of users and branches. Several branches, warehouses or companies mean more work on access rights and reports.
• State of the data. A clean product list in one format is migrated quickly. Duplicates, inconsistent names and old balances take extra time.
• Integrations. Connections to an online store, a bank, POS hardware or other software are each set up and tested separately.
• Custom requirements. Every requirement that standard Odoo features cannot cover means extra development and testing.
• Speed of decisions. When the company has a responsible person who answers questions quickly, the project moves forward without waiting.

Indicative timelines

The figures below are a general guide; the exact timeline is set for each company after the analysis:

Example: plan of a mid-sized project

In a project where accounting, inventory, sales and purchasing are implemented together, the work is usually split like this:

This is not a fixed schedule: when the data is ready and decisions are made quickly, the phases get shorter, while extra integrations and custom requirements make them longer. What matters is agreeing in advance on what will be ready at the end of each phase.

How to speed up the project

• Appoint a project owner. One person who sets aside time for the project every week and can make decisions shortens the timeline more than anything else.
• Clean your data in advance. Removing duplicates from product and customer lists and using one format for names and codes speeds up the migration.
• Start in phases. Launching the most important modules first and adding the rest later reduces both the risk and the length of the first phase.
• Consider standard processes. Odoo's ready-made workflows are often enough. Before each customization, check whether it is really needed.
• Train on time. When users learn the system before go-live, the first weeks are much calmer.

Frequently asked questions

Do we have to switch off the old system right away?

No. The old system is kept during the reconciliation period so that stock levels and reports can be compared. It is retired once the figures match.

Do all modules have to be implemented at once?

Not necessarily. Many companies start with sales, inventory and accounting and add manufacturing, payroll or CRM in a later phase. Odoo modules can be added at any time.

What happens after go-live?

Support is provided for several weeks after go-live: questions are answered and small adjustments are made. Training is also provided for employees who join later.

Conclusion

The length of an ERP implementation is determined not only by installing the software but by the company's processes, the quality of its data and the speed of decisions. A clear plan, a responsible person and a phased go-live make the project both shorter and safer. You can read more about how an implementation works on our Odoo implementation in Azerbaijan page.

How long would it take for your company? Contact us - after a free initial analysis we will show you the phases and an indicative timeline for your project.