She tracked down the author: a former student who’d failed her scheduling theory class three years ago. He’d written in his patch notes: "The manual's solution assumes zero-cost context switching. You said that was 'a harmless abstraction.' It’s not. Here’s the fix. Call it 'patched.'" | Job | Machine 1 | Machine 2
Used for or Fm|prmu|Cₘₐₓ (permutation flow shop). Lower bounds: remaining total processing time or Johnson’s rule relaxation. | Job | Machine 1 | Machine 2