Make the case for modernising a system that works reliably and is expensive to change.

What is being tested

Whether you argue in delivery and risk terms rather than in technology terms.

What does not work

"The technology is outdated." True, unfalsifiable from the funder's position, and it loses to a feature with a customer waiting. Age is not a business problem.

The four arguments that do

1. Risk with an external deadline — the strongest, because the date is not yours to negotiate:

"The database version leaves support in fourteen months. After that, no security patches. Our certification requires supported components, so we fail the next audit."

2. Skills scarcity, evidenced. "Two people can maintain this; one retires next year; we have not successfully hired for this skill in three years." A risk with a trajectory.

3. Cost, quantified — and the largest line is usually change cost, not licences:

"The last six changes averaged 14 days against three for comparable work elsewhere. That is four weeks of capacity per quarter and it has widened each quarter for a year."

4. Opportunity, made concrete:

"Three roadmap items depend on this component. At current change cost they are nine weeks; with the work done first, four. We have also deferred two initiatives because the change cost exceeded their expected value."

The deferred work is frequently the most persuasive item, because it is opportunity cost the business can feel.

Structuring it

Options with costs, including a cheaper partial option that captures most of the value. Presenting a full replacement alongside a targeted alternative makes the recommendation credible — and the targeted one is usually the honest recommendation, because incremental improvement succeeds where rewrites do not.

The cost of doing nothing, with a trend. Otherwise inaction looks free.

Incremental value, so cancellation does not lose everything.

A success criterion and a failure criterion. "Change lead time under five days within a quarter; if not achieved we reassess rather than continue." Stating the failure criterion is what distinguishes a business case from a request.

The framing that lands

Express the outcome as capability: "afterwards we can run promotional campaigns without a change freeze."

And where possible, attach it to a business initiative that already has funding and depends on it, rather than seeking separate investment.