Implementing a new ERP or financial management system can be a major undertaking that can disrupt your entire business if it’s done without a solid approach and strategy.
A phased implementation approach breaks the project into smaller, more manageable stages rather than attempting to launch every feature and process at once. This gives your finance team and wider business the opportunity to become familiar with the new system, embed best practice, and evaluate progress before moving on to the next phase.
During our Sage Intacct implementation for Medical Research Network (MRN), we collectively agreed that a phased approach would deliver the greatest value to the business.
In this article, we explore the reasons behind that decision and the benefits it provided. We have also written a separate piece on the most common implementation mistakes and how to avoid them.
Benefit 1 – De-risk the project
One of the major benefits of a phased system implementation is the ability to reduce project risk.
The first phase, the foundation of the project, is kept simple as possible and centred on core functionality and solid foundation. This gives the project a higher chance of completion within agreed timelines and lets you get the essentials right before introducing additional functionality, instead of attempting to transform every process at once.
Starting small also reduces the impact of any issues that may arise. If there is an error, it will only impact a limited area or part of the system and will be easier to identify and fix.
A phased approach can also help organisations manage project expenditure more effectively. Investment can be spread across the project lifecycle, for example the bulk cost will be paid for the main software implementation in phase one and then additional modules, add ons and requirements can be considered when appropriate. This flexibility helps prioritise your budget to the features and functionality that are essential.
Benefit 2 – Shorten time to live
Phasing your implementation can significantly reduce the time it takes to get started with your new system.
Instead of waiting for every requirement, integration, and bespoke development to be completed, your core finance system can go live earlier, with additional functionality introduced in later phases.
This approach is particularly valuable when custom developments or complex integrations are required.
Some may argue that a phased implementation can increase the overall project duration compared to a single “big bang” deployment. However, the key advantage is that users gain access to the system sooner, allowing them to build confidence, identify potential improvements, and provide valuable feedback before later phases are delivered.
Ultimately, this often leads to a smoother implementation and a better long-term outcome.
Benefit 3 – Learn the software
As your team gains hands-on experience with the new system, their understanding naturally develops beyond what is covered during formal training.
This real-world knowledge creates valuable opportunities to refine future phases of the project based on actual business requirements rather than assumptions made during the planning stage.
For example, functionality initially considered essential may prove less important in practice. Equally, users may identify new opportunities to automate processes, improve reporting, or enhance workflows that were not originally included in the project scope.
A phased rollout also makes change management significantly easier. Rather than asking employees to learn an entirely new system and multiple new processes at once, they can adapt gradually while continuing their day-to-day responsibilities. As McKinsey reports, “projects with strong buy-in see a 30% higher chance of success”, which translates to higher user adoption, greater confidence, and ultimately a stronger return on investment.
Why partner with PKF Smith Cooper Systems?
Every implementation is unique because every business operates differently.
A phased approach provides the flexibility and control needed to deliver a successful ERP or financial management system implementation while minimising disruption and risk. Although there are several ways to deploy a new system, a phased implementation remains one of the most effective and widely adopted approaches for larger projects or organisations.
At PKF Smith Cooper Systems, our experienced implementation consultants and project management specialists work closely with you to design a deployment strategy that aligns with your business goals, resources, and priorities.
Whether you are replacing legacy software, improving financial reporting, or preparing your organisation for growth, we will help you implement your new system in a way that delivers value quickly while setting the foundation for long-term success.
Related FAQs about Phased Software Implementation
Will I get a say over the project plan?
Yes, always! Before any work gets started, the plan for your project will be fully discussed and agreed upon with you. This might be a light scope for small works or a full formal scoping and business analysis exercise for larger projects.
How to I make sure my project succeeds?
We have written a full blog about the common reasons ERP implementations fail, but in short:
- Misaligned goals and expectations
- Resistance to change
- Underestimating the time and work required
- Rushing testing and training
- Issues with system and data compatibility
While successful projects all have the following in common:
- Clear business objectives
- Clean and accurate data
- Realistic deadlines
- Strong stakeholder involvement
- Engaged end users
- Comprehensive testing and training
What are the advantages of a phased system implementation?
There many benefits, but the top 3 always come down to:
- Reducing risk associated with the project to ensure it is completed on time and within scope
- Your team get to use the system sooner as the time to live is reduced for the core platform
- As your team gets their hands on the system quicker, they also have more time to get used to it and learn its nuances outside of prescribed training
Written by: Priya Wileman, Marketing Project Manager at PKF Smith Cooper Systems
Reviewed by: Philippa Leonard, Sage Intacct Team Leader at PKF Smith Cooper Systems
Last updated: September 2026
