There is no substitute to excellent HUMINT in preventing terror strikes and taking proactive steps to target terror organizations.
Intel inputs, terror alerts, and the Indian intelligence
According to security experts, Pakistan-based terror organizations -- with help from Inter-Services Intelligence -- have set up hundreds of terror cells/modules across India. A terror module is a functional unit which includes one or more terror cells. Every cell works independently of the other and the handlers in Pakistan manage these cells without worrying about the Indian agencies. The recurring terror strikes in our country suggests that the Indian agencies does not have the required human intelligence about the numerous cells and modules that operate here.