Understanding the Sample Registration System (SRS)

The question describes a system characterized by two key features: continuous enumeration of births and deaths by an enumerator, and an independent survey conducted by an investigator supervisor. This dual approach aims to capture vital events accurately and verify the data.

Key Features of SRS

• Continuous Enumeration: Trained local enumerators continuously record births and deaths in their assigned areas. This ensures timely data collection.
• Independent Survey: An investigator supervisor periodically conducts a survey in the same area. This survey independently verifies the events recorded by the enumerator, checking for omissions or errors.
• Dual System: The combination of continuous registration and an independent check makes the SRS a robust system for estimating vital rates.

Why SRS is the Correct System

The Sample Registration System (SRS) in India perfectly matches the description. It is designed specifically to provide reliable estimates of birth rates and death rates through this method of continuous enumeration and periodic independent validation by supervisors.

Evaluating Other Options

• Decadal Census: This is a comprehensive headcount conducted every 10 years, not a continuous system for recording births and deaths.
• Model Registration System: While it involves registration, it's often limited to specific areas or types of events and doesn't typically involve the described dual survey mechanism on a large scale.
• National Family Health Survey (NFHS): This is a large-scale, periodic survey (conducted every few years) that collects data on health and family welfare, but it's not a system for continuous, real-time enumeration of births and deaths by local enumerators and supervisors.

Therefore, the Sample Registration System is the unique approach that employs both continuous enumeration by an enumerator and an independent survey by an investigator supervisor.