The BBC World Service is monitoring the extra 30,000 U.S. troops deployed in Iraq since the launch of the "surge" in February. The criteria monitored are the effects, week by week, by looking at military casualty figures, the pressure on hospitals and quality of life for ordinary civilians.
The analysis is based on figures from U.S. and Iraqi authorities, Baghdad's hospitals and three families from different neighbourhoods in the capital.
Their analysis concludes that conditions are generally worse despite the recent efforts of U.S. to improve conditions.