Most warehouse business cases fail for the same reason: they open with the price of the software. That puts the conversation on the one number nobody wants to defend, and it skips the two numbers that actually decide the outcome.
There are three, and they are not interchangeable.
1. Cost — what the current process already spends
Cost is what is happening today, whether or not you approve anything. It is already in the payroll, in the credit notes and in the carrier invoices, which is exactly why it is invisible. Nobody signs off on it once a year; it leaks out weekly.
- Mispicks: the credit note, the replacement pick, the return freight and the customer-service handling on top.
- Search time: the minutes per order spent finding stock that the system says is somewhere else.
- Overtime and temps: the extra bodies that peak needs because throughput per person is low, not because volume is high.
- Write-offs: what the annual count reveals and the ledger quietly absorbs.
- Overselling: margin lost on channels that were promised stock you did not have.
The starting question is deliberately crude: is that a 4 or a 6? Four figures a year or six? Nobody needs a precise figure to answer it, and the answer alone usually settles whether the project is worth an hour of anyone's time. If the honest answer is four figures, stop — the current process is fine. It rarely is.
2. Investment — what the change costs, once
Investment is the deliberate, bounded spend that replaces the leak. It is not just the licence, and pretending otherwise is how business cases get reopened after approval:
- Subscription for the platform itself.
- Implementation: process configuration, integrations to ERP, webshop, marketplaces and carriers, data cleaning and testing.
- Hardware: scanners, access points, label printers.
- Internal time: the key users who design and test the flow — the cost most often left out and most often felt.
The distinction that matters to a CFO is that investment is scheduled and finite, while cost is unscheduled and permanent. A configurable platform keeps investment smaller because the work is process design rather than software construction — weeks rather than quarters, and no development bill when the process changes next year. The full breakdown lives in what a WMS costs.
3. ROI — what comes back, and when
ROI is the bridge between the two. It is not a percentage you quote; it is a payback period you can defend:
Payback (months) = investment ÷ monthly cost removed
In practice, operations that move from list-based picking to scan-driven execution see accuracy move from the 85–95% range into 99%+, and most of the savings above follow from that single change. A realistic payback for an SME sits around six months; a well-scoped mid-market rollout with a high error baseline often lands nearer two. If your model produces three weeks, the inputs are wrong. If it produces four years, either the leak is small or the scope is too big.
Put your own numbers in the ROI calculator — it works from the volumes and error rates you already know, not from a vendor's assumptions.
Why the order matters
Lead with cost and the conversation is about your operation. Lead with investment and it is about our price list. The first is a business discussion; the second is a procurement argument, and procurement arguments are won by whoever is cheapest, not by whoever fixes the problem.
So the sequence is: quantify the leak, size the change, divide. Three numbers, in that order.
A one-page version you can take to the board
- Baseline: orders per month, lines per order, measured error rate, hours per shift, temps through peak, annual write-off.
- Current cost: the five items above, annualised. One figure.
- Investment: subscription, implementation, hardware, internal time. One figure, split into one-off and recurring.
- Payback: months, with the assumption that produced it stated in one line.
- Risk: what happens to each cost item if volume grows 30% and nothing changes.
That last line is the one that closes it. Every cost item on the list scales with volume, which is why the problem announces itself during growth and why deferring the decision makes it more expensive rather than less.
Where BizBloqs fits
BizBloqs runs warehouse and order execution as a configurable service next to the ERP you already have, so the investment side stays small and time-to-value is measured in weeks. If you want to see the difference between the two systems first, read WMS versus an ERP warehouse module or the SMB comparison.
Book a demo and we will build the three numbers with you, against your own process.
