Late last spring, engineers at Searle, the pharmaceutical subsidiary of Monsanto, discovered a design problem in a factory the company was planning to build. Two pipes on top of a piece of equipment called a fluid bed drier would stand 6.08 meters tall, but the ceiling would be only 6.05 meters high. To figure out whether they needed to raise the ceiling, engineers would normally have to roll out a jumble of blueprints and spend hours comparing architectural and equipment drawings.

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