Every large industrial manufacturer has a standards problem — they just don't always know it yet.
The problem looks like this: a food and beverage company operates twelve plants across the country. Each plant has its own maintenance team, its own preferred electrical vendors, and its own history of capital projects managed by different engineering firms and different OEM equipment suppliers. Over fifteen years, the result is a facility portfolio where Plant A runs Allen-Bradley ControlLogix, Plant B runs a mix of Siemens and Allen-Bradley because a particular OEM preferred Siemens, Plant C has three generations of legacy pushbutton families because each project manager bought from a different distributor, and nobody can agree on a terminal block standard.
This is not a hypothetical. It is the reality at most multi-site manufacturers. The solution is standardization — and the entity best positioned to enforce it is the panel shop.
Why the Panel Shop Is the Right Place to Enforce Standards
Consider the flow of a capital project at a large manufacturer. The end user publishes a specification. An engineering firm designs the system. An OEM builds the machine. A panel shop fabricates the panel. The end user's maintenance team lives with the result for the next twenty years.
In this chain, every party has its own preferences and constraints. The engineering firm uses the component families it knows. The OEM specifies what is easiest for their assembly process. The end user's internal standards document — if one exists — is often ignored by the time it reaches the panel shop.
"The panel shop is the last point in the chain where the physical panel can be influenced before it enters the facility. A panel shop committed to enforcing standards will catch non-conforming specifications before they become installed hardware."
The Lean Spare Parts Advantage
One of the most tangible financial benefits of panel standardization is the impact on spare parts inventory. Industrial facilities carry spare parts for their control systems because when a component fails at 2 AM on a Sunday, waiting for a distributor to open Monday morning is not an option.
The Standardization Math
12 plants × unique component mix = $500,000 in fragmented spare parts inventory with significant gaps.
12 plants × standardized component family = $150,000 centralized inventory with better coverage for the entire network.
The same spare part that covers a failure at Plant A also covers the same failure at Plants B through L.
A panel shop tracking component families across a manufacturer's facility network can also provide an early warning system for component obsolescence. When a pushbutton family is discontinued, the panel shop can identify which plants are affected, how many units are installed, and what the approved replacement is — before a technician discovers the part is discontinued at the worst possible moment.
Managing One Contact Instead of Many
The organizational overhead of managing multiple panel vendors is rarely quantified, but it is real. Each vendor relationship requires qualification, ongoing communication, drawing submittals, purchase order management, delivery coordination, and quality follow-up.
Consolidating panel fabrication with a single qualified partner simplifies all of this: one vendor qualification, one set of terms, one point of contact for drawing submittals and quality issues, one invoice per month instead of twelve.
How to Structure a Standards-Based Panel Partnership
Implementing a standards-based panel partnership requires upfront investment from the manufacturer's engineering and procurement teams, but the structure is straightforward.
Document the Standards
Create a written electrical standards document specifying approved component families for each category: PLCs and I/O, drives, pushbuttons, contactors, terminal blocks, enclosures, and wire. Keep it living — update when components are discontinued or new platforms are approved.
Qualify a Panel Partner
Select a UL 508A certified panel shop with demonstrated experience on your approved platforms and a willingness to commit to the standards enforcement role. Include a facility audit, QMS review, and a pilot project.
Integrate into the Project Workflow
The panel shop receives your standards document and participates in drawing review for every capital project. When a drawing specifies a non-standard component, the shop flags it during review — before fabrication begins. This is where standards are actually enforced.
Build a Component History Database
Over time, the panel shop accumulates a record of every component installed in every panel it has built for you. This database is the foundation of your lean spare parts program and obsolescence early warning system.
Run an Annual Standards Review
Once a year, review the standards document together — identifying discontinued components, new platforms to add, and lessons learned. This keeps standards current and keeps the partnership aligned.
The Role of OEMs and Engineering Firms
A common objection to standards-based panel outsourcing is that OEM equipment builders and engineering firms will resist being told which components to specify. This objection is real but manageable.
OEMs resist non-standard components for two reasons: existing supplier relationships and processes built around specific component families. Both concerns can be addressed through the manufacturer's procurement process. An OEM that wants to sell equipment to a large manufacturer will adapt to that manufacturer's component standards if the standards are clearly communicated and consistently enforced.
Engineering firms resist non-standard components primarily because they design to what they know. Providing the engineering firm with the manufacturer's standards document — and making compliance a condition of drawing approval — is sufficient in most cases.
The panel shop is the backstop. Even when OEMs and engineering firms specify non-standard components, the panel shop's drawing review process catches the deviation before it becomes installed hardware.
Conclusion
Panel shop standardization is not glamorous. It does not generate the excitement of a new automation platform or a digital transformation initiative. But it is one of the highest-return operational improvements available to a multi-site manufacturer — delivering lower spare parts inventory costs, reduced troubleshooting time, simplified procurement, and a facility portfolio that is easier and cheaper to maintain for the next twenty years.
The manufacturer is the only party in the capital project chain with both the authority and the incentive to enforce standards across OEMs, engineering firms, and plant divisions. And the panel shop is the right partner to make that enforcement practical.
Outsourced Controls was built to be that partner.
About the Author
Paul Tables
Founder & CEO, Outsourced Controls. 25+ years in industrial automation and control panel manufacturing.