How to measure ROI on a digital transformation before you fund it

A business case that cannot be wrong is not a business case. It is a narrative with numbers attached.

The test is simple: read the document and ask what observation, twelve months from now, would prove the investment did not work. If no such observation exists, the case has not been made.

The four things a usable case commits to

A baseline. The current value of the metric, measured, not estimated. If you cannot measure it today, that is the first piece of work, and it is cheap.

A target and a date. One number, one deadline. "Improve efficiency" is not a target. "Reduce order-to-cash from 43 to 30 days by Q3" is.

An attribution rule. Written before the programme starts: how you will know the change came from this work rather than from seasonality, price changes or headcount.

A kill condition. The observation that would cause you to stop. Programmes with no kill condition do not get stopped; they get renamed.

Which metrics survive contact with reality?

Metrics that are already collected for another purpose, because nobody has an incentive to shade them. Order-to-cash days, first-pass yield, cost per transaction, time-to-close, and defect escape rate all tend to hold up.

Metrics invented for the programme rarely survive, because the programme owns both the definition and the measurement.

How do you attribute value to a transformation?

Use a comparison you decided on in advance: a control site, a control product line, or a pre-agreed seasonal adjustment. The method matters less than fixing it before you see the results. Choosing the attribution rule afterwards is how a programme proves whatever it needs to prove.

What is a realistic payback period?

For process-led transformation in mid-market industrial and services companies, a credible first measurable improvement lands six to nine months after go-live, with payback in eighteen to thirty months. Cases promising payback inside a year usually count avoided cost that was never going to be spent.

Start with the number you already trust

Pick the metric your board already argues about. Baseline it properly. Commit to a target, a date, and a kill condition. That single page is worth more than a hundred-slide business case, because it can be wrong.