In patients with Chronic Obstructive Pulmonary Disease (COPD), daily physical functioning as quantified by energy expenditure, is limited by decreased ventilatory capacity and increased basal metabolic rate in relation to their physical capacity. Starring from the Dutch Health-Care situation, a measurement interpretation model is presented to quantify individual potential for independent living from energy expenditure, aerobic capacity and lung function. The interpretation model concerns only simple routine measurements. After further validation, this model will be used in predicting the clinical effects of environmental improvements.