Revenue stops immediately
Retail has the least forgiving relationship with downtime of any industry we support. When the point of sale is unavailable, the business is not delayed — it is stopped, with customers physically present and a queue forming.
There is no catching up. Saturday afternoon’s trade does not move to Monday.
That single fact should drive most retail IT decisions, and it makes the business case for redundancy unusually easy to calculate. An hour of lost trade at your busiest time is a number you already know.
The failover nobody has
The highest-value change available to most retailers costs very little: automatic failover from the fixed internet service to mobile broadband.
Modern cloud point of sale, card payment, and stock systems all depend on connectivity. A single fixed service is a single point of failure for the entire trading operation, and outages are not rare.
A router with automatic failover switches within seconds and the transaction continues. A large proportion of the retailers we assess do not have this, and it is usually the first thing we recommend.
Alongside it: know what your specific POS actually does offline. They vary considerably — some queue transactions locally and reconcile later, some simply stop. Test it rather than discovering the answer in December.
PCI, explained proportionately
Accepting card payments creates PCI DSS obligations, and most small retailers have never had them explained. The scope depends almost entirely on one question: does card data ever touch systems you control?
If you use a standalone terminal from your bank or a provider like Square, and the card data goes directly from the terminal to the processor, your own obligation is comparatively light. You complete the self-assessment questionnaire your acquirer requires, you do not write card numbers down, and you do not store them anywhere in your own systems.
If card data passes through your network or your systems — an integrated POS handling card entry, or a web checkout you host — the scope grows substantially.
Establishing which situation you are in is the first step, and it is one many retailers have never taken.
Design for the peak
Systems that cope perfectly for eleven months of the year fail in December, because the peak is not a slightly busier average. Transaction volumes, concurrent users, network load and support demand all rise together at the moment failure is most expensive.
Capacity, connectivity and support arrangements should be sized for the peak. Testing before the peak, rather than discovering during it, is the cheap part.
Standardise before you replicate
The moment to get multi-site right is at store two, because whatever you build there becomes the pattern for stores three, four and five.
Same POS configuration, same network hardware, same build, centrally managed so a change is made once rather than repeated per site. A fault at any store is then a fault the support team has already seen at the others.
Retrofitting consistency across five stores that each grew their own way is a project. Establishing it at two is a decision.