Not only on feedback but technical and mechanical based designing problems..
Taking more power from OHE as electrical problems..
Weak parts etc
International bidding to get world class standard products by increasing few cost of production so that no new problems occurred..
That...
more... tender will be like same as alstom, siemens, bombardier company type
1st take their technology or things then open a plant in India to manufacturer that product in india under make in india scheme..
Not as just importing things from foreign which will cost more and no benefit to govt too