The Quality-of-Life Index (QLI) is based on:

The Quality-of-Life Index (QLI) is fundamentally grounded in the idea that a person's quality of life is influenced by the interaction of various environmental factors. This includes aspects such as physical, social, and economic conditions that affect people's well-being and overall life satisfaction. By evaluating how these different elements come together and impact human health and happiness, the QLI provides a nuanced understanding of quality of life.

This approach recognizes that the environment plays a critical role in shaping individual experiences and outcomes. Factors like air and water quality, housing conditions, access to healthcare, and social support systems are all considered in the context of human interaction with their surroundings.

In contrast, focusing solely on the control of external forces or on legal standards would not capture the full breadth of experiences that contribute to quality of life. Additionally, while input from medical experts can inform health-related dimensions of quality of life, the index itself encompasses a broader range of environmental interactions. It is this comprehensive interrelation among various factors that the QLI emphasizes, making it a valuable tool for assessing and improving quality of life in diverse populations.