Summarise a Technical Design Doc Into an Executive Version Nobody Skips

The design doc is thorough, correct, and twelve pages long, which means the one person who needs to approve it will skim the first paragraph and stop. This strips it to the problem, the chosen approach, what it beat, and the biggest risk, short enough that it actually gets read.

Summarise this technical design document into an executive version: {INPUT}. Cut everything that is implementation detail. Keep: the problem being solved, the approach chosen and the one or two alternatives it beat, the cost or timeline implication if stated, and the single biggest risk. Under 150 words, no jargon, written so someone with five minutes actually reads the whole thing.

[paste the design doc or relevant sections here]