The Challenges of a Postmodern ERP System

Modular architecture, best-of-breed solutions, cloud integration, and multi-vendor governance:post-modernERP represents a major shift in the way organizations structure their information systems.

A far cry from traditional monolithic software packages, it is based on a collection of specialized application building blocks interconnected via APIs. This is a powerful approach, but one that raises specific challenges in terms ofintegration, customization, training, and governance.

This article examines the key challenges to anticipate in order to successfully transition to a post-modern ERP system.

What is a postmodern ERP system?

The concept of postmodern ERP was formalized by Gartner as early as 2013 under the term “Postmodern ERP.” It refers to an architecture in which the traditional monolithic ERP—a single system covering all business functions—is broken down into a central core (often financial) supplemented by specialized satellite applications, chosen for their excellence in a specific area: HR, CRM, procurement, treasury, and ESG reporting.

These components are interconnected via APIs and integration platforms (iPaaS), which allows them to operate in a coordinated manner while maintaining their functional independence and their own update cycles.

By 2026, this approach had evolved into what Gartner now calls Composable ERP: an event-driven architecture, with a central integration hub orchestrating independent business building blocks. The goal remains the same: greater agility, less dependence on a single vendor, and the ability to modernize incrementally, but the maturity of integration tools and APIs has advanced considerably.

To learn more about the benefits of this approach for the finance department: The Benefits of an ERP System for the Finance Department.

Post modern ERP: integration and service continuity

Although a post-modern ERP system is an excellent solution for many companies, it is commonly associated with a significant deployment of IT specialists to carry out the integration, monitor operations, and manage the various stakeholders involved.

One of the key components of the pre- and post-integration phases is the management of ongoing operational monitoring. In fact, any of the integrated software components may be modified by one of your vendors. In that case, adjustments to your integration or your initial configuration may be necessary.

Being fully aware of this type of event, developing action plans, and planning the procedures to be carried out are all key factors for success—not only for the teams responsible for system operations, but also for quickly realizing the benefits of the updates planned by your suppliers.

One area that requires particular attention is the resilience of the integration chain. Even if your post-modern ERP system is fully integrated and runs like clockwork, a single weak point in any of the applications or links in the chain can compromise the efficiency—or even the basic operation—of the entire system. Isolating the source of an incident in a heterogeneous component configuration can be complex, and obtaining a fix that is compatible with the company’s operational requirements is even more so.

Customization, a never-ending activity

In addition to integration work, customizations and/or new developments may sometimes be required. Depending on the approach and method chosen to carry them out, the ability to respond to requests for adjustments or changes from business units may be more or less flexible.

Customization can be a background process in a post-modern ERP system, since its primary purpose is to better address special requests from departments, which in turn must adapt to the actions of competitors, regulations, standards, reporting requirements, or requests from third parties—whether internal, partners, or external.

ERP post modern : training

Although fully integrated, due to the use of different products and systems in a post-modern ERP, user training may vary from one software application to another. It is important to anticipate training needs, invest in the resources and tools required to deliver training, and stay informed about changes in functionality.

Based on our experience, we very often apply continuous transformation monitoring approaches when working with our clients.

The SLA (Service Level Agreements) of SaaS providers

The level of support provided by SaaS application vendors and cloud hosting providers is very likely to vary considerably from one to another. Even if your post-modern ERP system is fully integrated and runs like clockwork, a single weak link in any of the applications or integration points in the chain can undermine the effectiveness, efficiency, or even the basic operation of the entire system.

Identifying the source of the problem can be challenging in itself, particularly in a heterogeneous component configuration. Workarounding and quarantining the source of the incident can sometimes be complex. Obtaining a patch or a permanent solution may conflict with the company’s operational requirements.

Our experience with decision-making support provided to our clients shows that it is essential for any company undertaking a digital transformation or implementing a post-modern ERP system to have a thorough understanding of the contractual service commitment clauses (what is covered and what is excluded) for each component of the chain. It is also imperative to understand and account for the risk of warranty voiding associated with the implementation and deployment of customizations or developments, even if these were carried out in whole or in part by the supplier of the application or tool in question.

What steps should be taken when considering a post-modern ERP solution?

Companies considering adopting a postmodern approach must first conduct a preliminary impact assessment, followed by an evaluation of the software or software packages that will best align with their business strategy and operate as seamlessly as possible within their existing application architecture and infrastructure.

Decision-making and selection support also takes into account the parties responsible for the integration, administration, and maintenance of the future configuration under operational conditions.

Large companies, particularly those pursuing a new digital strategy, may find the postmodern approach quite appealing, provided they have a substantial budget and the in-house expertise to handle the development, implementation, and ongoing maintenance of such application suites.

Other companies—those that have already outsourced or scaled back their in-house IT capabilities, as well as mid-sized companies with more modest budgets—may initially be put off by the effort required. Nevertheless, this represents a tremendous opportunity to support growth and pull ahead of competitors who are stuck with systems that are already completely ill-suited to the needs of today’s employees.

In fact, if the new configuration still requires manual intervention and data does not flow seamlessly between system components, then a transition to a post-modern ERP system is likely to result in a counterproductive drain on time and budget.

To structure your selection process: Which Financial ERP Should You Choose? Criteria, Comparisons, and Tips .

Sponsors’ commitment to the program

As is often the case when a company makes decisions that affect the entire organization, a team of high-level sponsors must be involved. Since a variety of different systems must be integrated into a single solution, the leaders of the various departments affected must be able to influence the prioritization of processes within their areas of responsibility.

Evaluation of the systems under consideration

Since the concept of post-modern ERP involves the implementation of separate solutions, a clear understanding of what each vendor offers (or does not offer) is essential. Contract terms, warranty conditions, and SLAs must be thoroughly understood, particularly if customizations and/or developments are planned and if the provider’s internal teams are capable of handling incidents when they occur. Finally, if significant changes are made to SaaS solutions that are meticulously integrated with the core solution, a new set of complex interfaces may become necessary.

Total cost of ownership analysis

The total cost of such a venture must be assessed in light of alternative solutions that are more favorable to the balance sheet. The same applies when comparing it to the option of postponing the transaction and taking no action.

Conclusion: Postmodern ERP—Making a Successful Transition with the Right Partner

A well-designed post-modern ERP system brings about lasting transformation in information system performance. It provides the agility needed to adapt to regulatory, technological, and business changes—provided that the challenges of integration, governance, and change management are effectively addressed.

For more than 35 years, SQORUS has been supporting large enterprises and mid-sized companies in their financial information system transformation projects.

Would you like support for your post-modern ERP project? Contact us!

FAQ – The Postmodern ERP