Kunal Shah’s Delta 4 test is simple:
"Ask users to rate the current way they do something on a 10-point scale.
If your product doesn’t boost that score by at least 4 points (Δ ≥ 4) on speed, cost, convenience, or delight, they’ll likely stick to their old ways.
Hit Δ 4 or more, and they’ll switch — and then rave about it."
We’re watching that play out at CashBook right now.
A Mahindra-group dealership was an early adoptor of CashBook : UPI Wallets for Employees. Our champion there recently joined a much bigger logistics company with distributed warehouses.
First week in the new role? He reached out to us to set up CashBook for the whole organisation.
When your product lifts someone’s daily score from a 5 to a 9, they carry it with them, literally to their next organization.
Building with the Delta 4 lens keeps us honest, ambitious and customer-obsessed. If you’re curious what a Δ4 jump could look like for your finance ops, ping me anytime.
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