to the very limit, but real-world data was different, leading to breakdown. ✓ Tried to solve with the only available method in-house, but ran out of time and broke down. ✓ Kept adding conditions as requested by the client, eventually leading to breakdown. ✓ Believed interviews too easily and added too many detailed conditions, leading to breakdown. ✓ Said "university's main work got busy (or the assigned student stopped coming)" and quit midway. Deployment & Evaluation ✓ Pulled data one by one from the database with SQL, ran out of time. ✓ Problem scale gradually increased in real operation, making it unsolvable and leading to breakdown. ✓ Sales slipped their tongue saying labor costs would be halved, causing a rebellion on site and breakdown. 23