@OmSigDAVID,
David they came to the engineer in charge and his bosses told him to take off his engineer hat and put on his management hat.
So the senior engineer was pressure to overrule his own judgment by his superiors without engineering knowledge.
The chain started in the non-engineering non-pilots management of NASA then they applied pressures on the top management of the solid fuel boasters to wavier the temperature rule.
During the Apollo program every major supplier had an astronaut on site overseeing the suppler works and the suppler engineers and technicians had a personal relationship with a man who would be depending sooner or later on their work for his life.
I question that such a overruling of the engineers would had been possible under the Apollo system.