Sreedharan's gross engineering blunder

This was gross; I mean really really gross miscalculation on part of DMRC and Mr. E Sreedharan's team.
On Sunday July 12, 2009 a section of under construction viaduct and the "launcher" fell off. There is very little information about what caused that and the ill-informed democracy that we are, the actual reason will never be made public.
But the next day's cranes mishap was captured on camera, for general public to see how DMRC engineers are carrying out work!
As you can see in video, DMRC's crew was trying to lift the "launcher" with four cranes.
This was bound to fail! Understanding this requires only commonsense.

The most number of cranes you can add in one straight line is two.
If you try to have more than two cranes in a straight line (which was the case in this DMRC's attempt as they were trying to use four!), they can’t share the load equally.
This is exactly what happened on Monday. The three cranes had lifted one side of the "launcher" girder, while the other end was still resting on ground. Since other end was still on ground, only half the weight needed to be lifted, and any two cranes capacity was enough. When the fourth crane tried to lift the other end of the girder from the ground, the two middle cranes became slack, and entire load began to be shared by cranes on two ends. Neither of these two cranes had capacity to lift that kind of load. So the boom of crane on left side broke off, while the bottom of the crane on right gave up.
As that happened, the whole load shifted to two cranes on middle. The boom of second crane from left also broke down, while the fourth one, apparently the fittest of them all, did not break down and toppled.

The point here is, how could DMRC engineers make such a mistake? This gives an impression that they are relying more on layman instincts than on solid engineering principles in this critical project.