What Happens in the First 90 Days of an ERP Implementation

Go-live is often seen as the finish line of an ERP implementation.

In reality, it marks the beginning of a different stage of the project.

The first 90 days are when people build confidence in the new system, new processes become routine and the business begins to experience the operational benefits that motivated the implementation in the first place.

This period is about far more than learning new software.

It is about helping people adapt, refining processes, resolving questions quickly and ensuring the business gains value from the investment.

Understanding what typically happens during the ERP first 90 days helps businesses prepare realistic expectations and focus on the activities that make the biggest difference.

Go-live is the beginning, not the end

When an ERP system goes live, every department begins using the same connected platform for day-to-day operations.

Orders are entered into the new system.

Stock movements are recorded differently.

Purchasing follows new workflows.

Reports begin pulling information from a single source.

This represents a significant operational change.

Although planning, testing and training should already have prepared users, nobody expects every process to feel completely natural on the first day.

That is why the first few weeks focus on support, confidence and continuous improvement rather than introducing major changes.

The objective is stability first, optimisation second.

The first few weeks focus on confidence

Immediately after ERP go-live, users naturally have questions.

Some relate to navigation.

Others relate to business processes.

People often want reassurance that they are completing tasks correctly rather than discovering entirely new functionality.

This is perfectly normal.

Questions commonly include:

• Am I following the correct process?
• Why does this screen work differently from the old system?
• Where can I find this information?
• Has this transaction updated correctly?
• What should happen next?

Responding quickly helps users develop confidence.

Small questions answered early prevent frustration from building and encourage people to continue using the agreed processes.

Adoption is about people, not software

One of the biggest misconceptions about ERP implementation is that success depends entirely on technology.

In reality, successful adoption depends on people.

Different users adapt at different speeds.

Some embrace change immediately.

Others prefer familiar routines and need more time before the new system feels comfortable.

That is why ERP onboarding should continue after go-live rather than stopping once formal training finishes.

Users benefit from practical guidance based on the work they perform every day.

Warehouse teams may need additional support with stock transactions.

Finance users may refine reporting routines.

Sales teams often become more confident as they process more customer orders.

The more closely support reflects real business activity, the faster confidence grows.

Early feedback helps improve the system

The first 90 days are also an opportunity to learn.

No amount of planning can perfectly predict every operational scenario.

As users begin working in the live environment, they often identify small improvements that make everyday work easier.

Examples might include:

• adjusting reports
• simplifying screens
• refining approval workflows
• improving dashboard layouts
• updating user permissions
• clarifying business procedures

Not every suggestion should be implemented immediately.

However, collecting feedback allows the business to prioritise meaningful improvements once operations have stabilised.

Managers should monitor adoption, not just activity

The first 90 days are about more than measuring transactions.

Management should also monitor how comfortably teams are adapting to the new way of working.

Useful questions include:

• Are users following the agreed processes?
• Are departments working from the same information?
• Are support requests reducing over time?
• Are reports becoming easier to produce?
• Is confidence improving?

These indicators often provide a better picture of implementation success than simply counting completed transactions.

Reporting becomes more valuable

Many businesses begin seeing reporting improvements within the first few months.

Because departments are now working from connected information, management often spends less time reconciling data and more time analysing it.

Reports also become more consistent.

Instead of combining spreadsheets from different departments, the business can begin relying on shared operational information.

This is one of the reasons businesses invest in ERP.

The value comes not only from collecting information but from making it easier to trust.

Understanding ⁠how an ERP system connects inventory and operations helps explain why reporting often improves naturally once departments begin working within the same environment.

Process consistency develops over time

No business changes years of established habits overnight.

Even after successful training, users naturally become quicker and more confident as they gain experience.

The first three months are often when processes become consistent across departments.

People stop referring constantly to training notes.

Teams begin helping one another.

Managers spend less time answering procedural questions.

Departments develop greater confidence that everyone is following the same workflows.

That consistency is one of the biggest long-term benefits of ERP.

Support should remain available

Go-live should never mean the end of implementation support.

Questions continue to arise as different scenarios occur.

A month-end process may happen only once during the first month.

Annual procedures may not appear for much longer.

Keeping experienced implementation support available allows questions to be resolved before they become larger operational issues.

It also reassures users that they are not expected to solve every situation alone.

Our implementation doesn’t end at go-live. Customer requirements are reviewed through our Continuous Customer Care process, ensuring our wider support team understands your business and can provide ongoing assistance as new scenarios arise. 

Small improvements create significant gains

Many businesses expect dramatic transformation immediately after implementation.

The reality is often more gradual.

Small improvements accumulate.

Users complete transactions more quickly.

Reports require fewer manual adjustments.

Departments communicate more effectively.

Information becomes easier to access.

Confidence grows.

These changes may appear incremental individually, but together they create substantial operational improvements over time.

As we often tell customers, it’s better to walk before you run. Becoming comfortable with the core processes creates a stronger foundation before introducing additional functionality or refinements.

Common challenges during the first 90 days

Every implementation is different, but several themes appear regularly during the early stages.

These include:

• adapting to new routines
• answering user questions
• refining reports
• confirming business processes
• improving data quality
• increasing user confidence
• prioritising enhancement requests

None of these necessarily indicate problems.

In many cases, they simply reflect the normal adjustment period that follows implementation.

Businesses preparing for this stage often benefit from understanding the ⁠most common causes of ERP implementation delays so expectations remain realistic.

Strong communication remains important

Communication should not stop once the system is live.

Regular updates help reinforce progress, celebrate successes and address recurring questions.

Managers should encourage users to raise concerns early rather than developing workarounds independently.

Open communication also helps identify training opportunities and process improvements before they affect wider operations.

The first 90 days should feel collaborative rather than transactional.

The project continues to evolve

ERP implementation is not a one-day event.

It is an ongoing operational improvement programme.

The first 90 days provide the foundation for everything that follows.

Once the business is operating confidently, attention can shift towards optimisation, automation, reporting improvements and additional functionality.

Those enhancements are much easier to introduce once users have established confidence in the core processes.

Success is measured by confidence

The most successful ERP implementations are not necessarily those that finish fastest.

They are the ones where people understand the processes, trust the information and feel confident using the system every day.

That confidence develops during the first 90 days.

It grows through good communication, practical support, realistic expectations and continuous improvement.

When businesses invest in those areas, the implementation becomes more than a technology project.

It becomes the foundation for stronger operational performance long after go-live.

If you’re preparing for implementation or approaching go-live, our free Implementation Journey guide provides practical advice on planning, user preparation, training and the early stages of adoption to help teams build confidence from day one.

FAQ

1. What happens during the first 90 days of an ERP implementation?

The first 90 days focus on user adoption, process consistency, resolving operational questions, refining workflows and helping the business build confidence in the new system.

2. Why is ERP onboarding important after go-live?

ERP onboarding continues after go-live because users develop confidence through practical experience. Ongoing support helps reinforce training and encourages consistent processes across departments.

3. What challenges are common after ERP go live?

Common challenges include user questions, adapting to new processes, refining reports, improving data quality and prioritising enhancement requests as the business settles into the new system.

4. How do businesses measure ERP success during the first 90 days?

Success is usually measured by user confidence, consistent processes, improved reporting, fewer support requests and the ability of departments to work effectively from the same information.