OP merely asks for being productive. It is a pretty wide range. In fact, I'd argue that for anyone that knows some programming and in good GPA standing, 3 mont

OP merely asks for being productive. It is a pretty wide range. In fact, I'd argue that for anyone that knows some programming and in good GPA standing, 3 months is good enough for being productive. He can work on minor stuffs starting from 3 months.