Before revision:  We show here that the time evolution of the pandemic doubling time Td(t)  is a reliable  measure of the  efficiency of the Lockdown, case Finding , mobile Tracing (LFT) policy using modern technologies versus the traditional Lockdown Stop and Go (LSG) policy . This goal has been achieved to verify by extracting the time evolution of the doubling time Td(t). The results provide a quantitative measure and make possible predictions on the time evolution of epidemic for different containment policy. Where the lowest s factor , the characteristic time of the exponential growing Td(t) in the arrested regime, was reached by LFT policy also the lowest number of deaths and the shorter time width of the epidemic dome was reached.
After revision:  We show here that the time evolution of the pandemic doubling time Td(t) is a reliable measure of the efficiency of the Lockdown, case Finding , mobile Tracing (LFT) policy using modern technologies versus the traditional Lockdown Stop and Go (LSG) policy proposed by the Imperial College team in London. A very low s factor was reached by LFT policy also the lowest number of deaths and the shorter time width of the epidemic dome was reached.