A proactive EMS partner should do more than simply follow the customer’s instructions. But it should also know where to stop.
A few months ago, our purchasing team noticed something unusual on a motor-drive board we had been manufacturing for some time.
The product was stable.
The component was stable.
There was no immediate supply shortage.
But the price of one Texas Instruments power-management IC had started to increase.
At that moment, there was no reason to change the customer’s approved BOM.
The component was available, the product had already been validated, and replacing a power-management IC would introduce its own engineering and verification work.
So we did not change anything.
Instead, we looked at what could happen if the price trend continued.
Based on the customer’s expected production volume, the additional cost could eventually become significant. If the increase continued for another two months, the accumulated cost on a mass-production order could exceed the cost of repeating a CE certification process.
That made the situation worth discussing with the customer.
We brought the information to them and asked a simple question:
Would you like us to investigate alternative components?
We did not replace the TI device.
We did not change the BOM.
We did not start purchasing a substitute.
We simply gave the customer the information and let them decide whether the potential saving justified the engineering work.
The customer agreed to investigate.
This example illustrates a question that comes up regularly in OEM manufacturing:
When an EMS partner sees a potential improvement, how proactive should it be?
Our answer is:
Be proactive in identifying opportunities and risks, but conservative when implementing changes.
An OEM’s engineering team naturally focuses on the product.
The purchasing team focuses on commercial conditions and supply.
The EMS sees something slightly different.
It sees the product moving through:
BOM → sourcing → PCB assembly → testing → production → repeat orders
That position can reveal changes that are difficult to see from a single department.
For example, an EMS may notice:
None of these necessarily means the product has a problem today.
The important part is recognizing when a current situation could become a problem later.
That is where proactive manufacturing support can be useful.
There is a very important boundary.
An EMS partner should be willing to say:
“We noticed something that may be worth considering.”
It should not automatically say:
“We changed it because we thought it was better.”
For an OEM product, an apparently simple component change can affect much more than the BOM.
It may affect:
Even a technically equivalent component may require approval before it can become the new production standard.
This is particularly important for industrial electronics, where products often remain in production for years and changes may need to be controlled carefully.
Therefore, the supplier’s role is not to make the customer’s decision.
It is to make sure the customer has useful information early enough to make that decision.
After the customer agreed to investigate the TI power-management IC, we considered two directions.
The first was a pin-to-pin replacement.
The second was a non-pin-to-pin alternative.
These represent two very different approaches to component optimization.
A pin-to-pin device can potentially reduce the impact on the existing PCB design.
If the electrical specifications and application requirements are appropriate, it may allow the project to retain much of the existing hardware design.
That can reduce:
But pin-to-pin does not mean automatically interchangeable.
The actual electrical characteristics still need to be checked against the application.
A component that fits the same footprint may behave differently under certain operating conditions.
So the correct approach is still:
Identify → Evaluate → Validate → Approve → Implement
not:
Find → Replace
The second direction was more open.
Because the Fumax engineering team had been involved in the long-term production of this motor-drive product, we already understood the surrounding circuit and manufacturing environment.
That meant we could also consider components that were not pin-to-pin compatible.
A non-pin-to-pin alternative could require:
So it carries more implementation risk.
But it can also create more possibilities.
Restricting a component search to pin-to-pin devices may eliminate alternatives that could provide a better overall balance of cost, availability, and performance.
The important point is that both options can be presented to the OEM.
For example:
| Option | Potential Advantage | Main Consideration |
|---|---|---|
| Pin-to-pin | Lower PCB and implementation impact | Fewer available alternatives |
| Non-pin-to-pin | Broader optimization possibilities | More engineering and validation |
The EMS can provide its recommendation.
The customer decides which direction is appropriate.
Every manufacturing recommendation eventually comes back to three variables:
A cheaper component is not automatically a better component.
A shorter lead time may come with a higher price.
A more robust component may increase material cost.
A new production process may reduce labor but require tooling investment.
The value of an EMS recommendation therefore comes from understanding the trade-off.
In the motor-drive example, the issue was not simply:
“The TI component is getting expensive.”
The real issue was:
“If the current trend continues, the future cost impact may become large enough to justify the engineering effort required to evaluate alternatives.”
That is a very different statement.
It connects a purchasing observation with an engineering decision.
Not every observation deserves an escalation.
A manufacturing partner may notice dozens of small opportunities every week.
If every one becomes an email or meeting, the customer will quickly receive more noise than useful information.
A useful issue is one where early action could materially affect one or more of the following:
Could the current situation create a significant future cost increase?
Could a different process or component reduce a meaningful quality risk?
Could early action prevent a future supply or production delay?
Would waiting make the eventual engineering change more expensive or difficult?
Could a current component become difficult to source later?
This is why timing matters.
A problem that is discovered six months early may be an engineering decision.
The same problem discovered one week before production may become an emergency.
This is one of the less obvious benefits of an experienced manufacturing partner.
Sometimes the best result is not a change.
It is simply giving the OEM enough time to decide whether a change is necessary.
Consider the motor-drive board again.
At the time we raised the TI price trend, there was no immediate shortage.
The customer could therefore make a rational decision.
They could:
There was no emergency.
That is exactly why the discussion was useful.
If we had waited until the component became unavailable or the price increase had already affected a large production order, the customer’s options would have been much more limited.
Proactive manufacturing support is therefore often less about making immediate changes and more about creating decision time.
This is the principle behind the approach:
Be proactive in identifying possibilities, but conservative when implementing changes.
In practical terms:
Identify
Notice something that may affect cost, quality, delivery, or supply.
↓
Analyze
Determine whether it is significant enough to investigate.
↓
Propose
Present the situation and possible options to the customer.
↓
Validate
Check technical feasibility and understand the required verification.
↓
Obtain Approval
Let the OEM decide whether the change should proceed.
↓
Implement
Only then should the approved change enter the production process.
This distinction is especially important when the EMS has accumulated substantial experience with a product.
The more familiar the supplier becomes with a customer’s product, the more useful its recommendations can become.
But familiarity should never be confused with ownership of the product.
The OEM still owns the design decision.
An experienced EMS does not necessarily know the answer to every problem.
What it can often recognize is which questions are worth asking.
For example:
Instead of waiting for an IC to become unavailable:
“Is this price trend likely to affect the next production run?”
Instead of automatically replacing a component:
“Would the potential saving justify the validation effort?”
Instead of proposing only one substitute:
“Should we compare a lower-risk pin-to-pin option with a potentially more economical non-pin-to-pin option?”
Instead of waiting for a production bottleneck:
“Is the current test method still efficient at the expected production volume?”
These questions do not change the customer’s product.
They improve the quality of the decisions surrounding its production.
That is often where manufacturing experience becomes most valuable.
A proactive EMS partner should not be measured by how many changes it proposes.
In fact, unnecessary changes can create more problems than they solve.
Every change can introduce:
Sometimes the correct recommendation is:
Keep the existing solution.
If the current component remains commercially reasonable and technically reliable, changing it simply because an alternative exists may not make sense.
The purpose of proactive manufacturing support is therefore not to constantly optimize the product.
It is to identify situations where doing nothing may eventually become more expensive, riskier, or slower than taking action early.
The most useful relationship is neither completely passive nor overly aggressive.
An EMS partner should be close enough to the production process to notice what is changing.
It should have enough manufacturing experience to evaluate whether that change matters.
It should be willing to propose alternatives when there is a meaningful reason to do so.
But the final product decision should remain with the OEM.
The division of responsibility is straightforward:
The EMS identifies and evaluates.
The OEM decides and approves.
The EMS implements the approved decision.
For the motor-drive board, that meant not replacing a proven Texas Instruments component simply because its price had increased.
It meant recognizing a developing cost issue early, giving the customer enough information to evaluate it, and preparing more than one possible solution after receiving approval to investigate.
That is what we believe proactive EMS support should look like.
Not making more decisions for the customer, but helping the customer make better decisions before they become urgent.
