The bedside chest radiography process was analyzed in terms of modern
quality management guidelines and the sources of quality problems were
identified. In order to analyze systematically the various quality fa
ctors, the process was described in a top-down fashion with the aid of
data flow diagrams. Two internal quality control points and one exter
nal point were found in the process. Means to measure quality at the q
uality control points including questionnaires and a formula for calcu
lating the internal quality index were developed.