WHO has developed and implemented a Survey Program and a World Health Survey to compile comprehensive baseline information on the health of populations and on the out comes associated with the investment in health systems; base line evidence on the way health systems are currently functioning; and, ability to monitor inputs, functions, and out comes.

Objectives of the WHS:

• Develop a means of providing low-cost, valid, reliable and comparable information.
  
  
• Build the evidence base to monitor whether health systems are achieving the desired goals.
  
  
• Provide policy–makers with the evidence they need to adjust their policies, strategies and programs as necessary.