0–39: Not ready
On these answers the launch is being carried by the date rather than the preparation. The problem evidence, the channel and the operational rehearsal are all provisional, which means the market will end up conducting the testing your process has not.
40–59: Gaps to close
The core proposition has evidence behind it, but the machinery around it is unfinished: typically sales enablement, support rehearsal or a competitive response no one has planned for. Launches in this band tend to survive week one and struggle in month three, when the gaps meet real volume.
60–79: Nearly ready
Most of the readiness conditions are in place and the remaining items are specific rather than structural. The characteristic risk now is the calendar: with the launch visibly close, open items get reclassified as fast-follow, and fast-follow is where launch discipline goes to dissolve.
80–100: Launch ready
Evidence, operations, enablement and metrics are in place to a standard most launches never reach. What a readiness score cannot test is the market's opinion: a perfectly executed launch of a proposition the market shrugs at is still a shrug, just a well-organised one.