Your MES, WMS, EDI, and ecommerce connections all work. The question worth asking is how much of your team's year goes into keeping them working.
Your MES posts production counts to the ERP overnight. Your 3PL gets an EDI file. Your webstore pulls inventory on a schedule, and finance gets a warehouse extract every morning. All of it works. It also breaks whenever a trading partner changes a spec, a vendor pushes an update, or someone asks for one more field on an existing feed.
The Integration Layer Nobody Budgeted For
Nobody sat down and decided to build a middleware platform. It accumulated. A point-to-point connection here, a scheduled script there, a mapping tool somebody set up in 2016, and one staging database that half the plant depends on. Every piece of it solved a real problem on the day it went in.
The trouble is what it adds up to. McKinsey's research on technical debt puts the accumulated cost at 20 to 40 percent of the value of an entire technology estate before depreciation, and it flags a specific tipping point: when a company spends more than half its IT project budget on integrations and fixing legacy systems, it has stopped paying down the principal and is only servicing the interest McKinsey, 2020. Most IT leaders we talk to recognize that line without needing the chart.
Integration Debt Shows Up as a Change Tax
You feel integration debt in the estimates, not the budget. Sales wants a new ecommerce channel. A customer moves to a different EDI standard. The plant adds a line and wants it reflected in scheduling. Each one sounds small to the business and lands on your team as weeks of work, because the change has to be traced through every connection it touches and tested against systems that were never designed to talk to each other.
That surcharge is measurable. Deloitte's 2026 Global Technology Leadership Study found technical debt now accounts for 21 to 40 percent of IT spending Deloitte Insights. That is the share of your budget going to what already exists, before a single new capability gets funded. For a manufacturing IT team of four or five people, it is also the reason the roadmap keeps slipping.
What Changes When Integration Ships With the Platform
The difference between legacy ERP and a modern cloud platform is not that one integrates and the other doesn't. It's who builds and maintains the connection.
In Dynamics 365 Business Central, the data is already exposed. The REST and OData v2.0 APIs are standard endpoints, not a custom build. Dataverse virtual tables let Power Platform apps read and write Business Central records in place, so you are not copying data into a second store and reconciling it later. The workflow glue that used to be a scheduled script becomes a Power Automate flow your team can read.
Dynamics 365 Finance & Supply Chain Management works the same way at a larger scale. OData and custom service APIs cover the transactional traffic, dual-write keeps F&SCM and Dataverse in step in near real time, and virtual entities expose F&SCM data to the rest of the Microsoft stack without another copy.
The practical result is ownership. A connection built on documented, supported interfaces survives the person who built it. That is the part legacy integration almost never gives you.
Which Platform Fits Your Operation
If you run one or two sites, a handful of integrations, and the volumes your current server handles fine, Business Central usually covers the ground without more ERP than your team is ready to adopt. Process manufacturers who need batch, formulation, and quality depth typically add Yaveon on top of Business Central rather than moving up a tier.
If you are running multiple legal entities, several plants on different processes, or high transaction volumes that already force overnight batch windows, F&SCM tends to handle that model more gracefully. The integration story is the same in both cases. The difference is how much operational complexity sits behind it.
Integration Debt Is Also an AI Question
Manufacturers are putting real money into connected operations. Deloitte's 2026 Manufacturing Industry Outlook found 80 percent of manufacturing executives plan to invest 20 percent or more of their improvement budgets in smart manufacturing Deloitte Insights. That investment pays off in proportion to how well the data underneath it is connected.
AI is now built into Microsoft's ERP rather than bolted on beside it, and it reads from the same shared data layer your integrations use. Copilot capabilities in Business Central and F&SCM work off that model, which means the work you do to retire point-to-point connections is also the work that makes AI useful. Clean up the plumbing and you have done the AI readiness project at the same time.
Where Western Computer Fits
We have spent nearly 40 years and more than 1,750 implementations untangling connections like these for manufacturers, and we are a Microsoft Inner Circle member for AI Business Solutions. The pattern we see is that integration debt rarely gets solved as its own project. It gets solved when the platform underneath it changes and the custom layer stops being necessary.
If you want the full picture of where legacy ERP puts your IT team at risk, download the whitepaper: Patch, Pray, Repeat. It covers integration debt alongside seven other impacts, with the sources behind each one.
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