Local knowledge is not expertise: The internal specialist and his blind spot

The internal specialist knows every machine. But when did he last see the inside of another plant? Why depth without breadth feels like expertise, and four ways to give him a basis for comparison.

Who is the specialist at your plant? And when did he last see the inside of another plant?

The scene repeats itself on many assignments. A company introduces someone to us: “This is our absolute specialist in this area.” An hour of conversation, and the picture is clear: the man knows his plant inside out. Every machine, every quirk, every exception. But he has not been anywhere else for twenty years.

This is not a criticism. It is a question of reference points. In this article, we at SMART iNTERIM explain why depth without breadth feels like expertise, where the overconfidence really lies and how you can give your specialist the basis for comparison they lack.

Why depth without breadth feels like expertise

Someone who has perfected a process in one place knows everything about that process. They just do not know what has long been done differently elsewhere. Whether their batch sizes are normal. Whether the effort they put into changeovers is typical. Whether the intermediate storage they consider unavoidable simply does not exist in five other plants.

From the inside, this difference is imperceptible. Depth without breadth feels exactly like expertise: you know every answer because you have dealt with every question before. What is missing is a benchmark. Without comparison, there is no way to tell whether a solution is good or merely familiar.

From the outside, the blind spot is immediately obvious, not because an outside perspective is any wiser, but because it brings a basis for comparison.

Where the overconfidence actually lies

Not with the specialist. They do their job, and usually they do it well. The overconfidence lies with the company that mistakes site-specific knowledge for expertise.

The difference costs years. A company that regards its specialist as the benchmark stops asking questions. Suggestions for improvement are measured against that specialist, and anything they do not know is considered unworkable. That is how changeover times, inventory levels and lead times become laws of nature, even though they are merely the habits of one site.

The specialist is the least to blame for this. They have never been given the chance to test their benchmark.

Three questions you can use to check for yourself

• When did your specialist last see a comparable process at another company? Not at a trade fair, not in a presentation. On a factory floor, during live operations. If the answer is more than three years ago, they lack a basis for comparison.
• Can they say what is unusual about your plant? This is the most incisive of the three questions. Someone who has known only one site for years considers everything normal because they have seen nothing else. Anyone who cannot answer this question has no basis for comparison, only habit.
• Who challenges them internally? If nobody does, they are not the best. They are the only one. And an unchallenged specialist is more dangerous for a company than having no specialist at all, because their limitations become the plant’s limitations.

How to give your specialist breadth rather than replace them

The solution is not to replace the internal specialist with an external one. The solution is to give them the basis for comparison they lack. This costs less than it sounds.

• Plant visits to suppliers and customers. Both are usually happy to open their factory doors, and both manufacture under different conditions. Two visits a year, with the explicit task of bringing back three examples of things done differently there.
• Exchanges with peers at other companies. A production planner who meets planners from other plants twice a year learns more about their own benchmark in one afternoon than in a year of training. Industry associations and regional networks often already organise this.
• Rotation across sites. Companies with several plants already have a basis for comparison in-house. Six months at another plant changes your perspective permanently, even if the processes there are worse, because that too provides a benchmark.
• The task of describing your own plant. Ask your specialist to write down for a visitor what makes your plant different from others. Anyone who struggles with this has recognised the point themselves. This is often the moment when curiosity emerges.

All four measures strengthen the specialist rather than embarrass them. That is precisely what matters, because their site-specific knowledge remains valuable. It just needs a benchmark alongside it.

When an outside perspective is needed

There are situations where a basis for comparison is needed sooner than it can be developed internally: a turnaround, a relocation, a ramp-up, a programme that is already going off track. In those cases, it helps to have someone on site who has seen many plants from the inside and can therefore immediately recognise which special case actually occurs everywhere and which “unsolvable” situation has long been resolved elsewhere.

The value lies not in being smarter than your own people. It lies in bringing the benchmark they were never given.

The best specialist is not the one who knows everything about your plant. It is the one who knows how things are done elsewhere and can therefore recognise what is distinctive about yours.

When did your specialist last see another plant from the inside?

Frequently asked questions

What is the difference between site-specific knowledge and expertise?

Site-specific knowledge means fully mastering a process at one site: every machine, every exception, every quirk. Expertise means being able to put that process into context, knowing what is typical and what is unusual about it. The former develops through years in the same place, the latter only through comparison with other plants.

How can you tell that an internal specialist lacks a basis for comparison?

Through three questions: When did they last see a comparable process at another company? Can they say what is unusual about their own plant? And who challenges them internally? Anyone who answers the first question with more than three years, cannot answer the second and names nobody for the third has site-specific knowledge, but no benchmark.

How do you give an internal specialist breadth without replacing them?

Through comparison, not training: plant visits to suppliers and customers, regular exchanges with peers at other companies, rotation across sites, and the task of describing their own plant for a visitor. All four strengthen the specialist rather than embarrass them.

When does a plant need an outside perspective?

When a basis for comparison is needed sooner than it can be developed internally: during a turnaround, relocation, ramp-up or a programme that is already going off track. The value lies not in being smarter than your own people, but in bringing the benchmark they were never given.

About SMART iNTERIM

SMART iNTERIM Management is a transformation partner for manufacturing: Operational Transformation, SAP and Enterprise Transformation, Program & Project Management, as well as Interim Management and Executive Search. We bring hands-on experience, not a detached perspective. Headquartered in Switzerland, with an office in Dubai.