Standard MES not running smoothly after purchase has almost become an industry consensus. Secondary development is not a scam but an inevitability of manufacturing's special nature. This article explains the reasons and responses in one go.
After more than a decade of IT projects for manufacturing enterprises, we encounter the same scene almost every year: a factory spends hundreds of thousands on a standard MES, uses it for a quarter, and then the production supervisor starts sticking notes in the system and going through offline processes. It is not that the system is bad; it just did not grow out of the real workshop processes.
Why standard MES always falls short
Standard MES modeling is designed for an "ideal factory": standardized material codes, fixed process routes, and stable cycle times. But in reality, most factories are "semi-standardized": the same part number may correspond to three packaging specifications, process routes are slightly adjusted according to veteran workers' habits, and urgent insertions happen at any time.
These "exceptions" often have no place in standard systems, so employees can only handle them offline. Over time, the data in the system becomes inaccurate; when data is inaccurate, no one trusts the system, creating a vicious cycle.
What secondary development actually changes
We categorized the secondary development requirements for manufacturing MES, and the top categories are always these: first, connecting with existing ERP and WMS interfaces—standard products often "have" interfaces, but field definitions do not match; second, adapting workshop reporting methods, as the combination of barcode scanners, PDAs, and electronic kanban differs by factory; third, implementing exception processes such as rework, material replenishment, and order insertion—standard systems usually only "support" them and cannot fit the shop floor.
So secondary development is not because standard systems "fail," but because the manufacturing shop floor is never standard.
How to prevent secondary development from becoming a bottomless pit
First, do not just look at the feature list during selection. Ask the vendor to demonstrate with your real BOM and process routes to see how it handles the "exceptions" in your factory. Second, define the boundaries of secondary development in the contract: which are standard functions, which are custom items, and custom items are billed by person-day, to prevent arbitrary price increases after go-live. Third, be sure to reserve an interface budget; half the value of MES lies in the data flow between it and ERP and WMS.
For a hardware factory we served, standard MES selection took three months, and secondary development and interface integration took another four months. After go-live, the workshop supervisor said, "Now this feels like our factory's system." That sentence was worth all the investment.
A practical word for factories preparing to implement MES
Treat secondary development as part of the budget, not an unexpected expense. Spend two to three weeks clarifying the factory's exception processes before discussing system selection; that is more important than anything else. Shenzhen Dushi Technology has accumulated complete MES implementation experience in the manufacturing industry and can provide support from selection assessment to secondary development to ERP integration. If you have a specific project, welcome to talk with us.