If you're responsible for a growing organisation, it's easy to assume that Software-Defined Wide Area Networking (SD-WAN) only becomes relevant once you've reached a certain number of locations. In reality, SD-WAN is not defined by how many sites you have. It's worth considering when your network becomes harder to manage, secure or scale using traditional approaches.
Managing 50 sites can certainly expose those challenges more clearly than managing five. But site count alone isn't the deciding factor. What matters is the level of visibility, resilience and control your organisation needs.
The biggest difference isn't simply scale.
At five sites, most IT teams can still manage the network through a combination of monitoring tools, supplier relationships and team knowledge. At 50 sites, that informal approach becomes much harder to sustain.
|
Area |
At smaller scale |
As the estate grows |
|
Visibility |
Gaps are already common; 59% of UK IT leaders report incomplete visibility into their infrastructure, even at this scale |
The same gaps quietly multiply across every new site, until no single view of the estate exists |
|
Troubleshooting |
Faults still mean ruling out multiple causes and owners before a fix starts |
The same process repeats across more systems and suppliers, resolution time stretches without anyone deciding it should |
|
Configuration |
Small inconsistencies get tolerated because they seem harmless in isolation |
Each uncorrected inconsistency gets copied onto every site that followed, without anyone choosing that outcome |
|
Suppliers |
Each relationship is manageable on its own |
Every supplier relationship that wasn't standardised early becomes its own contract, SLA and escalation path |
|
Deployment |
New sites are handled individually, which works while there aren't many |
Without a repeatable process built early, every new site quietly inherits the last one's workarounds |
|
Business continuity |
Risk is visible now, while it's still simple enough to act on |
The same risks become invisible, not because they vanished, but because no one had the full picture by the time they mattered |
|
Network control |
Local knowledge still works, for now |
Local knowledge doesn't scale, and the gap it leaves often isn't noticed until it's already a problem |
The important point is that these challenges can also appear in smaller estates. Managing five sites that support revenue-critical operations can be more demanding than managing dozens of low-dependency locations.
Most organisations don't intentionally create complex networks.
Growth often happens through:
Over time, that can leave organisations with:
None of these decisions are necessarily wrong.
The challenge is that complexity accumulates. Each variation adds another dependency that the IT team needs to understand, support and troubleshoot.
This is often the point where organisations start questioning whether their networking approach still matches their operational needs.
59% of IT leaders lack complete visibility into their IT infrastructure, and as a result 77% say they're unable to quickly meet the needs of the business due to a lack of internal resources and skills. (Daisy Corporate Services, survey of 250 UK senior IT decision-makers, via IT Reseller Magazine)
One of the clearest indicators that a network is becoming difficult to manage is when teams spend more time finding information than fixing problems.
Questions that should be simple become difficult to answer:
Without a central view, answers may be spread across monitoring systems, supplier portals, spreadsheets and internal documentation.
For time-poor IT leaders, that creates operational friction long before it becomes a technical problem.
Many organisations assume they'll know when it's time to modernise their network.
In reality, complexity tends to build gradually. A new office is added using the supplier available locally. An acquired business retains its existing connectivity. A temporary workaround becomes part of the permanent estate. Different teams own different contracts.
None of these decisions creates a problem by itself. Collectively, they can leave the network increasingly difficult to understand and support.
One warning sign is when key knowledge sits with a small number of individuals. Another is when routine questions require information from multiple systems before decisions can be made.
At that stage, the challenge is often operational complexity rather than network performance.
When organisations think about networking, they often focus on outages.
The broader risk is inconsistency.
Over a quarter (33%) of UK businesses report revenue losses of up to £4 million due to network outages or poor performance, with an additional 18% losing more than that. (Expereo, Enterprise Horizons 2025, via Computer Weekly, July 2025)
One location may have resilient connectivity and excellent application performance. Another may rely on a single connection, experience slower response times and follow a completely different support process.
That inconsistency can affect:
The goal is not to make every site identical.
A head office, warehouse, retail branch and contact centre may all require different levels of connectivity and resilience.
The objective is to ensure those differences are intentional rather than accidental.
No. This is one of the most common misconceptions about SD-WAN.
Following a wave of IT disruptions across the sector, nearly half (50%) of UK businesses have been forced to re-evaluate their technology infrastructure, and 35% of UK tech leaders say networking has risen higher up the C-suite agenda as a result. Networking and connectivity is now the top technology investment priority for UK businesses. (Expereo, Enterprise Horizons 2025, via Computer Weekly, July 2025)
Managing 50 sites often makes the benefits easier to see because operational complexity is more visible. However, organisations with a smaller number of sites may still find value in SD-WAN.
For example, SD-WAN may be worth considering if:
The question is not "How many sites do we have?". The better question is:
"How easy is our network to manage, monitor and scale?"
The decision to evaluate SD-WAN should not be driven by an arbitrary number of locations.
Managing 50 sites can expose networking challenges more clearly than managing five, but the underlying drivers are usually visibility, resilience, consistency and operational control.
For some organisations, those challenges appear early. For others, they emerge much later.
What matters is understanding whether your current networking model still supports the needs of the business today and the demands you expect tomorrow.
Alternatively, reach out and speak to one of our experts to review your current estate:
0808 500 1436 enquiries@intercity.technology