What actually differs between the six arms

What actually differs between the six arms An architecture diagram generated by Archify. Which box · read along the row · Architecture component Which box read along the row Arm A · the baseline · Architecture component · sealed 4/8 Arm A the baseline sealed 4/8 Arm B · whole machine reset · Architecture component · sealed 6/8 Arm B whole machine reset sealed 6/8 Arm C1 · one box changed · Architecture component · sealed 8/8 Arm C1 one box changed sealed 8/8 Arm C2 · one box changed · Architecture component · not in the pack Arm C2 one box changed not in the pack Arm C3 · one box changed · Architecture component · not in the pack Arm C3 one box changed not in the pack Arm D · whole machine reset · Architecture component · sealed 6/8 Arm D whole machine reset sealed 6/8 Pick a question · changes four times · Architecture component Pick a question changes four times whatever is blank · a fixed checklist · Architecture component whatever is blank a fixed checklist splits the most · how many it separates · Architecture component splits the most how many it separates changes action · would the farm act on it · Architecture component changes action would the farm act on it plus two ideas · expected cut and a cache · Architecture component plus two ideas expected cut and a cache same as C2 · nothing changed here · Architecture component same as C2 nothing changed here the shared sign · what most of them share · Architecture component the shared sign what most of them share Write it down · changes three times · Architecture component Write it down changes three times just the cost · what each call cost · Architecture component just the cost what each call cost evidence trace · every ask and every skip · Architecture component evidence trace every ask and every skip same as B · nothing changed here · Architecture component same as B nothing changed here same as B · nothing changed here · Architecture component same as B nothing changed here plus a note · nothing ever reads it · Architecture component plus a note nothing ever reads it seen and asked · no reason kept for skips · Architecture component seen and asked no reason kept for skips Send to the vet · the refusal door · Architecture component Send to the vet the refusal door by score · None must beat all 14 · Architecture component by score None must beat all 14 by structure · not in the catalogue · Architecture component by structure not in the catalogue same as B · nothing changed here · Architecture component same as B nothing changed here same as B · nothing changed here · Architecture component same as B nothing changed here same as B · nothing changed here · Architecture component same as B nothing changed here padlocked · 0 referrals in 8 cases · Architecture component padlocked 0 referrals in 8 cases Other 6 boxes · hear, build, ask, stop · Architecture component Other 6 boxes hear, build, ask, stop its own design · the model does the ranking · Architecture component its own design the model does the ranking rebuilt from A · code decides everything · Architecture component rebuilt from A code decides everything same as B · nothing changed here · Architecture component same as B nothing changed here same as B · nothing changed here · Architecture component same as B nothing changed here same as B · nothing changed here · Architecture component same as B nothing changed here rebuilt again · counts, seats, governor · Architecture component rebuilt again counts, seats, governor Legend Arm heading Door works The box Changed here Door fails Unchanged

Read the grey

  • • Grey means identical to the arm on its left
  • • C1, C2 and C3 are almost all grey
  • • Only two coloured cells separate them

The only two forks in the C family

  • • C2 added expected cut and a cached first turn
  • • C3 added a note that no caller ever reads
  • • So C3 scores exactly what C2 scores

A and D are different machines

  • • A lets the model score and rank the diseases
  • • B and C let code decide; D leaks reportables
  • • Research only. Nothing deployed.